What Were They Up To? Celebrities Fete Fourth of July

Jamie Foxx wowed the crowd at the House of Blues Music Hall at Showboat during a celebrity studded July Fourth weekend at Caesars Atlantic City in New Jersey.

On Sunday, July 3, Grammy Award-winning hip-hop artist Nelly hosted a July Fourth weekend celebration at JET Nightclub at The Mirage Resort & Casino, treating a packed house of partygoers to a special live performance that featured new and old hits.

On Saturday July 2, "Real Housewives of Orange County" blonde bombshell Gretchen Rossi celebrated July Fourth at Las Vegas hotspot BARE Pool Lounge at The Mirage Hotel & Casino.

On Saturday, July 2, "Keeping Up With The Kardashian"'s star Rob Kardashian spent July Fourth weekend at JET Nightclub at The Mirage Resort & Casino in Las Vegas.

During Independence Day weekend, Alessandra Ambrosio hosted the second annual Follow the Sun summer party at East Hampton hotspot, SL East.The supermodel was snapped with fiance Jamie Mazur and 'Twilight' star Kellan Lutz.

Stars of "Ice Loves Coco", Ice-T and Coco, were among many who celebrated the Fourth at Marquee Nightclub at The
Cosmopolitan of Las Vegas.

"Holly's World" star Angel Porrino was spotted at Marquee Dayclub at The
Cosmopolitan of Las Vegas.

Little Richard performs during the annual PBS "A Capitol Fourth" concert on July 3, 2011 in Washington D.C.

Jordin Sparks performs during the annual PBS "A Capitol Fourth" concert on July 3, 2011 in Washington D.C.

"Dancing with the Stars" pro Chelsie Hightower performs during the annual PBS "A Capitol Fourth" concert on July 3, 2011 in Washington D.C.

Josh Groban performs during the annual PBS "A Capitol Fourth" concert on July 3, 2011 in Washington D.C.

Steve Martin performs during the annual PBS "A Capitol Fourth" concert on July 3, 2011 in Washington D.C.

Hot dogs! BBQs! Fireworks! From Vegas bashes to poolside fun, take a look at how some of Hollywood and music's biggest stars feted Independence Day!