The 34-year-old singer also revealed that she's a fan of the dad bod and has a crush on Prince Harry.
Justin Bieber has a fan in Britney Spears.
The 34-year-old singer appeared on the UK-based talk show Loose Women on Tuesday, where she was challenged to a game of "Snog, Marry, Avoid" -- with Bieber, Madonna and Simon Cowell.
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While at first visibly disgusted by her choices, Brit Brit seemed to make her mind up pretty quickly.
"Justin Bieber marry," she yelled out, before changing her mind and going for the smooch.
"Okay, so who would you marry?" one of the show's hosts followed up.
"None," the singer answered, choosing to avoid both Cowell and Madonna.
Watch Spears’ lighting round below, where she also reveals she's a fan of the dad bod and has a crush on Prince Harry.
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Spears might be down to snog Bieber, but that doesn't mean she's looking for a relationship anytime soon.
"I'm not [dating]," she announced earlier in the show. "I'm happily single right now."
"I like younger guys. I do," she added. "Like, this morning for instance, this guy came, who was like, my waiter, and I was like, 'Oh my god! You're adorable!' and he was so cute.”
But when it comes to her perfect date, Spears is pretty much up for anything. "I like spur of the moment things. I don't like it to be so planned, like, 'Let's go on a date.' I like just things to happen," she said.
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The pop star has been an open book about her dating life recently, dishing more on the subject to Lorraine Kelly on Britain's ITV just last week.
"It's okay to be single!" she insisted. "I'm in a really good place right now. I'm loving myself every day and learning who I am. It's awakening, it's cool."
"I like my 30s way more than my 20s," she added. "My 20s were horrible! [Being] in my teens was fun, but I like my 30s."
See more in the video below.