<human>: Rascal Flatts is an American country band formed in Columbus, Ohio in 1999. It is composed of Gary LeVox, his second cousin Jay DeMarcus and Joe Don Rooney. DeMarcus is also a brother-in-law of country music singer James Otto, and formerly one-half of the Christian music duo East to West. They are best known for performing a cover of Tom Cochrane's "Life Is a Highway".

Rascal Flatts released their first greatest hits CD, Greatest Hits Volume 1, on October 28, 2008. The album contains 13 of their biggest songs, starting with "Prayin' for Daylight" and going through "Life Is a Highway". The limited edition of the album contains a second disc with three Christmas songs: "White Christmas", "Jingle Bell Rock", and "I'll Be Home for Christmas". A year later in October 2009, they released a second edition of their greatest hits collection, this time with a second disc containing live performances of "Take Me There", "Summer Nights", "Me & My Gang", and "Winner at a Losing Game".  Rascal Flatts released the first single, "Here Comes Goodbye", from their album Unstoppable to radio on January 20, 2009, and the album was released on April 7. "Here Comes Goodbye" became the group's tenth No. 1 hit. The song was co-written by American Idol season six finalist Chris Sligh. The second single, "Summer Nights", co-written by Gary LeVox, was released in early May 2009, debuted at No. 57 and topped out at No. 2 on the country charts. The group performed "Summer Nights" at the CMT Music Awards, Oprah's Kickoff Party, and the finale of America's Got Talent. The third single off the album, "Why", peaked at No. 18 on the country charts. Rascal Flatts performed "Why" on The Tonight Show with Conan O'Brien. The band released their fourth single, "Unstoppable", in January 2010.  A special release version of their album Unstoppable is available at JCPenney stores nationwide. It features a special release song entitled "American Living" only available on the albums sold at JCPenney stores. JCPenney is an official sponsor of Rascal Flatts' Unstoppable American Living Tour in a two-year partnership and $1 of every CD sold at JCPenney will be donated to the JCPenney Afterschool Fund. On July 16, 2009, as part of the JCPenney American Living Tour, Rascal Flatts made history as the first country music group to play Chicago's Wrigley Field. The trio was joined by fellow artists Vince Gill and Darius Rucker for a near-sellout crowd. CANNOTANSWER

How many albums did they sell?
<bot>: CANNOTANSWER