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Britney Spears is making no secret of that fact that she's single again. "MTV News" says she confirmed her breakup with boyfriend David Lucado onstage Sunday night during her "Piece of Me" show at the Planet Hollywood in Las Vegas.

The star reportedly told her crowd, "Well, by now everyone knows my boyfriend cheated on me."  Attendees showered Britney with support and boo-ed Lucado over the allegations of his infidelity. 

The onstage relationship update was also Britney's segue into another part of her concert, continuing the tradition of tying a fan to her leash for the S&M-themed song "Freakshow."  She picked gossip blogger Perez Hilton out from the audience and had some fun, showing fans she's holding her head high after the recent split. 

Photo: Splash News