"Let It Rock" is the debut single of Kevin Rudolf. It was produced by Rudolf for his debut album, In the City and features a verse from rapper Lil Wayne.

In the U.S. and Canada, the song reached #5 on the Billboard Hot 100, number #6 on the Pop 100 and #2 on the Canadian Hot 100. The first week, the song debuted at number 45 on the Australian Singles Chart and eventually reached number 3. In the United Kingdom, the song climbed to number 40 on physical release but due to an increase in airplay, due to BBC Radio 1 adding it to their A-list, the song climbed thirty places to number 10 in the song's second week on the chart; then it rose to number 5 the following week. "Let It Rock" was number 28 on Rolling Stone's list of the 100 Best Songs of 2008. The single was also the official theme song for WWE's 2009 Royal Rumble. It is also featured in the video game Madden NFL 11. According to in-game files, the song was also originally meant to appear on Grand Theft Auto V's Non-Stop-Pop FM radio station, but it was not included in the final release of the game.

Let It Rock was featured in the 2013 Atlantic City, New Jersey tourism commercials.

"Let It Rock" was certified Triple Platinum by the RIAA on May 5, 2009. As of July 2011, the song has sold 4,000,000 digital downloads, making it Lil Wayne's third 4-million-seller.

The single was certified platinum in the U.S. on December 15, 2008.

The music video for "Let It Rock" features Kevin Rudolf and Lil Wayne performing in front of both a crowd and a dark background, sometimes lit with various effects such as strobe and laser lights. The NBA on TNT features a version of the music video to promote the 2009 NBA All-Star Game featuring the players competing in the event.

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