Weekend Vegas Photos [UPDATED with Soulja Boy]: Mel B’s shaved head, Travis Barker, Robert Kardashian-plus

Matt Goss opened his show at Caesars Friday night, with help from friends Natasha Bedingfield and Mel B (with half her head shaved). (Courtesy photos Denise Truscello/Wire Image)

Here's me (left) looking up and wondering if we buy our hats at the same place. I think we do. I should have turned around for the other view!

And below, Goss with (left to right) producer Robin Antin, Leona Lewis, Mel B and Natasha Bedingfield.

Soulja Boy performed "Kiss Me Thru the Phone" and other hits at CityCenter's club Eve. (Courtesy photos Eve)

Meanwhile, drummer Travis Barker returned to Pure, this time with partner DJ A-Trak. And DJ Casanova bid fond adieu to the late DJ AM. (Courtesy photos Ron Koch/Pure)

Robert Kardashian did his birthday at Mirage club Jet. (Courtesy photo Denise Truscello/WireImage)

And Jerome Bettis got his 38th birthday cake at Venetian's Tao and partied with Kordell Stewart and Hines Ward. (Courtesy photos Al Powers)

Plus MMA's Gray Maynard, Ray Sefo and Jay Hieron were there as well: