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"  Britney Spears and Lady Gaga posed for a photograph in Las Vegas last night (February 1). Gaga attended Spears&amp;#039;s latest &amp;#039;Piece of Me&amp;#039; show at the Planet Hollywood Resort &amp;amp;amp; Casino, and went backstage to meet the &amp;#039;I Wanna Go&amp;#039; singer before the show.      The pair have met previously, when Gaga presented Spears with the Michael Jackson Video Vanguard Award at the 2011 MTV VMAs.  Earlier this week, Spears tweeted at Gaga, teasing: &amp;quot;Little bird told me something cool today. See you soon @LadyGaga ;)&amp;quot; Fans immediately suspected a potential collaboration, but it now appears that Spears could simply have been referencing Gaga&amp;#039;s Las Vegas visit.           Gaga tweeted to say how much fun she had at the show, adding: &amp;quot;And Britney&amp;#039;s dad gave us homeade BBQ, it was one of the best things I&amp;#039;ve ever eatin&amp;#039; in my LIFE.&amp;quot; The singers waved and blew kisses at each other during Spears&amp;#039;s performance of &amp;#039;Till The World Ends&amp;#039;, as Gaga made an early exit. Watch Britney Spears in the music video for &amp;#039;Work Bitch&amp;#039; below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.cosmopolitan.com/entertainment/celebs/news/a19749/lady-gaga-and-britney-spears/?src=rss>