The Hannah Montana [ tickets ]/Miley Cyrus [ tickets ] "Best of Both Worlds" concert movie will be released Mar. 11 exclusively at Wal-Mart--one month before it is available in other stores, according to a press release. The two-disc, CD+DVD package contains 14 live songs--seven performed as Hannah Montana and seven by Miley Cyrus. One of the Montana numbers is a duet of "We Got the Party" with the Jonas Brothers, who opened the mega-concert tour for Cyrus and her television alter-ego, pop superstar Montana. The bonus DVD will feature two live video performances from the "Best of Both Worlds" tour--"Rock Star," performed by Montana, and "Start All Over," by Cyrus--as well as behind-the-scenes footage from the sold-out tour. An MP3 version of the release can be purchased and downloaded at walmart.com beginning Mar. 11.