On "Let's Do This", a party dance track,Cyrus sings about owing her fans a good performance with lines such as: "You came a long way to be with us / You paid good money to see a show / So let's get ready 'cause here we go". The song was originally written and recorded by singer Adam Tefteller.
The single was released on December 13, 2008 on Radio Disney and Disney Channel (video taken from a live performance in Irvine) to support the third season of Hannah Montana. "Let's Do This" was featured four times during the third season in the episodes: "Papa's Got a New Friend", "Jake... Another Little Piece of My Heart", "Miley Hurt the Feelings of the Radio Star" and "He Could Be the One". It was also used as background music in Hannah Montana: Sing Whaaat?, various commercials for Hannah Montana: The Movie and in the ending credits for the film.
A music video for the song premiered on Disney Channel on December 13, 2008. The video features footage of Miley Cyrus (as Montana) performing the song during a live filmed concert.  The performance included dance routines, lifting, and fireworks. The video, along with seven others are available in the iTunes deluxe edition and the physical CD of Hannah Montana 3.