DJ Zedd performed for guests including Gabrielle Union and Jack Osbourne & wife Lisa Steely at the opening of Light Nightclub at Mandalay Bay on May 24, 2013 in Las Vegas, Nevada (Photo credit: Denise Truscello / WireImage www.DeniseTruscello.net).

Photo credit: Denise Truscello / WireImage www.DeniseTruscello.net.

Photo credit: Denise Truscello / WireImage www.DeniseTruscello.net.

Photo credit: Denise Truscello / WireImage www.DeniseTruscello.net.

Photo credit: Denise Truscello / WireImage www.DeniseTruscello.net.

Photo credit: Denise Truscello / WireImage www.DeniseTruscello.net.

Photo credit: Denise Truscello / WireImage www.DeniseTruscello.net.