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The “Perfume” singer, who split from boyfriend David Lucado two weeks ago after he cheated on her, made an unexpected guest appearance on the show during Fallon's farcical “Pros and Cons of Dating Britney Spears" sketch.
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"She's recently single, she sings good jingles, she loves her Pringles and she's ready to mingle," Fallon announced, before introducing his top secret guest.
Spears, 32, looked amazing in a low-cut, bright red jumpsuit as she walked onto the show to a rapturous standing ovation from the audience.
Fallon's first gift to Britney was a profile he'd set up for her on the dating app Tinder. Looking outraged, the mom-of-two told the SNL alum she was "thrilled" about his intervention in a stunningly sarcastic voice.
The comedy duo then gave fans the ultimate list of the pros and cons of dating Britney Spears – including the gems of information that she loves to snuggle in bed, and she now has her own underwear line so anyone can wear her undies.
Click on the link above to watch the hilarious sketch!