===2009-2012: ''Play On และการร่วมผลงาน''===
[[ไฟล์:Carrie Underwood in April 2011 (2).jpg|อันเดอร์วูดแสดงที่ United States Naval Academy เมษายน 2011|thumb|left]]
อันเดอร์วูดปล่อยอัลบั้มที่สาม [[Play On]] เมื่อวันที่ 3 พฤศจิกายน 2009<ref>[http://www.carrieunderwoodofficial.com/us/news/its-official-carries-new-album-play-out-nov-3]</ref> อัลบั้มนี้เปิดตัวที่อันดับ 1 บน [[Billboard_200|Billboard 200]] และ Top Country Albums ขายไปได้กว่า 318,000 ก๊อปปี้ในสัปดาห์แรก
and became, upon its release, the top-selling release of the year by a female artist, but was later overtaken by Susan Boyle's I Dreamed a Dream and finished the year as the number two. Underwood wrote a song with pop/R&B singer-songwriter Ne-Yo for the album, the song however did not make the album. The first single from the album, "Cowboy Casanova", co-written by Underwood, Brett James and hip hop producer Mike Elizondo, was released in September 2009. It was a huge success, jumping from No. 96 to No. 11 on the Billboard Hot 100 in its second week, one of the biggest single-week upwards on the chart of all time. It later peaked at number one on Billboard's Hot Country Songs in just ten weeks, the year's fastest chart-topper by a country female and the fastest No. 1 of her career, and has sold over 2 million copies, being certified 2-time Platinum by the RIAA. Second single, "Temporary Home" hit number one on the Billboard Hot Country Songs and the RIAA certified it Gold. "Undo It", Underwood's third single from "Play On", was released to radio in May. It was later certified Platinum by the RIAA and hit number one on the Hot Country Songs chart, giving Underwood her tenth number one single on the Hot Country Songs. The 4th single from Play On, "Mama's Song", was released to country radio in September, peaked at two on the Hot Country Songs and was certified Gold by the RIAA. The album is certified Double Platinum by the RIAA.
Underwood's Play On Tour started its first leg on March 11, 2010 in Reading, Pennsylvania. The second leg of the tour started on September 25, 2010 in Portland, Oregon, and ended January 1, 2011 in Detroit, Michigan. Underwood sold out the prestigious Hollywood Bowl on October 2, 2010. In December 2010, Pollstar.com ranked the Play On Tour one of the Top 50 tours of 2010, at number 18 on the North American raking, and number 31 worldwide. Billboard also ranked Underwood's tour at number 24 for all worldwide tours of 2010. On January 4, 2011, official statistics revealed that Underwood played to over 1 million fans throughout the tour, resulting in her being named again as the top-ranked female country touring artist of the year.
At the 2009 CMA Awards, she received two nominations and co-hosted the ceremony with Brad Paisley. Underwood was nominated for six Academy of Country Music Awards. At the show, Underwood was named Entertainer of the Year, making her the first woman in history to win this award twice. Host Reba McEntire presented Underwood with the "ACM Triple Crown Award" signifying her winning Top New Artist, Top Female Vocalist, and Entertainer of the Year during her career. She was only the second Female to win the coveted "Triple Crown Award", the first being Barbara Mandrell. At the CMT Music Awards Underwood walked away with Video of the Year for "Cowboy Casanova" and also won CMT Performance of the Year for "Temporary Home" from CMT: Invitation Only presents Carrie Underwood. Underwood won two international awards at the 8th French Country Music Awards, which were Best Female Vocalist and Video of the Year, for "Cowboy Casanova". At the 2010 American Music Awards, she won "Favorite Country Album", for "Play On", making her the only artist in the American Music Award history to have all albums awarded in such a category. She co-hosted the 2010 CMA Awards with Brad Paisley for the third year in a row. Underwood was the 2010 American Country Awards' top winner with six wins, Artist of the Year, Female Artist of the Year, Album of the Year for (Play On), Female Artist Single of the Year for ("Cowboy Casanova"), Female Artist Video of the Year for ("Cowboy Casanova") and Touring Artist of the Year. At the 2011 Grammy Awards, Underwood was nominated for 'Best Female Country Vocal Performance' for "Temporary Home." Underwood was honored by the CMT Artists of the Year special as one of the 5 top Artists of the year in 2010 in country music. The event aired on CMT on December 3, 2010. At the 2011 Academy of Country Music Awards, Underwood sang with Steven Tyler both her song "Undo It" and Aerosmith's "Walk This Way". In May 2011, Underwood was one of the seven women to be honored by the Academy of Country Music at the Girls' Night Out: Superstar Women of Country special. She was recognized for being the first and only female artist in the Academy's history to ever win Entertainer of the Year twice. At the ceremony, Vince Gill introduced Underwood and presented her with the special award. He sang one of her hits, "Jesus, Take The Wheel", and joined Underwood on a rendition performance of "How Great Thou Art". The video of the performance turned into a viral sensation, reaching 3 million views on YouTube within two days. On December 5, 2011, Underwood won three awards at the 2011 American Country Awards, including Female Artist of the Year for the second consecutive time.
In December 2009, Some Hearts was named the No. 1 Country Album of the 2000 Decade by Billboard and Underwood was the top-ranked female artist on Billboard's Best Country Artists of the 2000 Decade list. Overall, she was ranked number 50 on the Artists of the Decade list by Billboard. Also in late 2009, Underwood had her very own CMT Invitation Only and also hosted a Christmas special, Carrie Underwood: An All-Star Holiday Special, a two-hour variety show on Fox that featured Dolly Parton (with whom she sang a rendition duet of "I Will Always Love You") season seven American Idol champion David Cook, Kristin Chenoweth, Brad Paisley and others. In May 2010, Underwood was selected on People Magazine's 100 Most Beautiful People List for 2010. This was the 4th year in a row that she was selected for the list. Also in May, Victoria's Secret named her legs the Sexiest Legs in Hollywood. In June 2011, Rolling Stone magazine ranked Underwood as the number eleven Queen of Pop, based on a lot of criteria from 2009 until 2011. Underwood co-wrote and recorded a song titled "There's a Place for Us," the lead single from The Chronicles of Narnia: The Voyage of the Dawn Treader. Underwood and songwriters, David Hodges and Hillary Lindsey, received a nomination for the Golden Globe Award for Best Original Song. In March 2011, Underwood sang John Lennon's "Instant Karma!" at the NBC's special All Together Now – A Celebration of Service, which honored former President George H. W. Bush. At the season ten finale of American Idol Underwood selected a song for contestant Lauren Alaina to sing.
Underwood is featured on "Remind Me", a duet with Brad Paisley that reached number one on the Billboard Hot Country Songs, giving Underwood her eleventh number one single on such chart and fourteenth overall. She has also a duet with Tony Bennett on his 2011 album Duets II and another duet with Randy Travis on his 2011 Anniversary Celebration album. Underwood was one of the headliners of the iHeartRadio Music Festival. The event took place on September 23 and 24, 2011. On September 19, Underwood performed "You Really Got a Hold on Me" in order to honor Smokey Robinson, as he was presented with the Ella Award at the Society of Singers annual dinner. Robinson returned the favor to Underwood by singing "My Girl" to her. At the same event, they sang together with Stevie Wonder, Natalie Cole and other artists a medley of multiple songs. In 2010, Underwood was reported by Forbes to have earned over $13 million from May 2009 to May 2010, being the top-earning Idol. In July 2011, Forbes reported that Underwood earned over $20 million between May 2010 and May 2011, being the top-earning American Idol alumnus for the fourth consecutive year.
On February 4, 2012, Underwood joined Steven Tyler to record CMT's Crossroads at the Pepsi Coliseum during the Pepsi Super Bowl Fan Jam of Super Bowl XLVI. It was the highest-rated episode in seven years. On February 12, 2012, Underwood and Tony Bennett performed their duet "It Had to Be You" at the 54th Annual Grammy Awards. They also sang the song on the season two premiere of Blue Bloods in September 2011.
===2012-2013: ''Blown Away และทัวร์ระดับโลก''===