[artist id="501686"]Britney Spears[/artist] wrapped up the U.S. leg of her [article id="1619413"]Circus tour[/article] on Sunday in true Las Vegas Fashion with a 90-minute set at Mandalay Bay, which was attended by Barry Manilow and Brit's longtime friend, former [artist id="500956"]'NSYNC[/artist] member Lance Bass.
Spears reportedly gave Bass some special treatment during the show. People reports that Bass was brought onstage during the singer's sexy rendition of "Breathe on Me" — the song during which she usually serenades a male audience member — and she proceeded to give a lap dance to the openly gay singer, who smiled and sang along.
Sunday night's show wasn't the only one attended by celebs. On Saturday, Miley Cyrus and Spice Girl Mel B. caught Britney's concert, as Spears wrapped the U.S. tour she began back in March in New Orleans. She is next set to play a string of dates in Australia in November. This week, she'll also be dropping her [article id="1622166"]new single, "3,"[/article] which will be included on her upcoming Singles Collection, due out November 24.
While she was in Vegas, Spears was seen with her sons, Jayden James and Sean Preston, and rumored boyfriend Jason Trawick, shopping for candy at the Mirage's Sugar Factory.
"She spent about $3,000 and walked out of the store with 10 bags," a source told People. "She got a bunch of candy and shirts for her kids and got a bunch of the couture lollipops to give to her backup dancers."