Rock Star Supernova singer Lukas Rossi proudly showed off his boxer-briefs outside Jenna Jameson’s birthday party on Monday night (April 9) at 40 Deuce. The artist recited “an ode to Ellen Degeneres,” the talk show host who gave him “Rossi Posse” embossed underwear. Also on hand was Jenna’s pal Paris Hilton. Watch footage from TMZ below. Check out pictures from WireImage.