Rock Star: Supernova was the second season of the reality television show Rock Star. The show, hosted by Dave Navarro and Brooke Burke, featured 15 contestants competing to become the lead vocalist for a newly formed supergroup featuring Mötley Crüe drummer Tommy Lee, former Metallica bassist Jason Newsted, and former Guns N' Roses guitarist Gilby Clarke. As the show's name implies, the new group was to be called Supernova; however, another band named Supernova was granted an injunction against the television supergroup stating that they cannot use the name "Supernova" for any promotion or perform under that name. With this judicial ruling, the band announced their official name would be "Rock Star Supernova".

The show began online on the Rock Star web site on MSN on Monday, July 3rd with an Internet exclusive weekly episode and premiered on 5 July 2006 on CBS in the United States and Global in Canada. Votes could be cast on the Rock Star website or by text message on Verizon Wireless.

Unlike in the first season, the behind-the-scenes episodes were not televised in the U.S.; instead, they were available online at the official MSN sponsored website, to subscribers of Verizon, and through the Rock Star tab on Windows Live Messenger. However, these "In the Mansion" reality episodes did air on television in Canada on Global, in Australia on Foxtel channel FOX8, and in Asia on STAR World.

Supernova will record an album after the show's run with the first single released in September 2006. Supernova's first concert performance will take place on New Year's Eve at The Joint at the Hard Rock Hotel and Casino in Las Vegas, Nevada. A world tour will follow in early 2007. Lukas Rossi became the frontman of Supernova on September 13, 2006.

Five musicians made up the house band that backed the 15 contestants during the show. The house band was made up of Paul Mirkovich, Jim McGorman, Nate Morton, Sasha Krivtsov, and Rafael Moreira.