It was an extravaganza of international superstar DJs and producers last night at Surrender Nightclub at Encore Las Vegas (Photos by Bryan Steffy/WireImage).

Afrojack with birthday cake at Surrender Nightclub
Photos by Bryan Steffy/WireImage.
Scottish sensation Calvin Harris and Dutch Grammy-winning Afrojack turned up the heat on an already white-hot weekend music at the 60,000 square-foot lush oasis reminiscent of an upscale European beach party scene. Surprising the capacity crowd by joining Afrojack in the DJ booth was fellow Dutchman and R3hab, followed by Montreal-born electronic music pioneer, A-Trak.

Afrojack at Surrender Nightclub
Photos by Bryan Steffy/WireImage.
Afrojack, who turns 24 in a few days, was presented with a birthday cake which he took a big bite from before a downing a celebratory slug of Grey Goose from the bottle.
Tito Ortiz was also spotted with Jenna Jameson, on hand for the Labor Day Weekend festivities.

R3hab, A-Trak and Afrojack
Photos by Bryan Steffy/WireImage.

Calvin Harris at Surrender Nightclub
Photos by Bryan Steffy/WireImage.

R3hab and Afrojack
Photos by Bryan Steffy/WireImage.

Tito Ortiz & Jenna Jameson at Surrender
Photos by Bryan Steffy/WireImage.