Taylor Swift and Harry Styles; Justin Bieber and Selena Gomez: Celebrity cootie alert!

Crédit photo: Getty Images Taylor Swift and Harry Styles; Justin Bieber and Selena Gomez: Celebrity cootie alert!

Monday's celebrity romance gossip all comes down to the same old question: Are they or they aren't they?

Moving on to more adorable gossip: Justin Bieber and Selena Gomez were photographed by E! News holding hands in Beverly Hills Sunday night, and the same goes for One Direction's Liam Payne and his reported ex-girlfriend Danielle Peazer, who were spotted in NYC.

Are all these kids back together?

Just friends?

Just exchanging cooties?!

And if the last point is true, could Harry Styles and Taylor Swift also be -- cootie alert! -- at risk?

Like themselves.

People notes that Swift and Styles didn't come off as "overly affectionate," though they say Swift was acting "flirty."

"Harry and Taylor were walking next to each other. They seemed happy to be together, talking and smiling," one witness told E! News. "Taylor seemed to be in a great mood. Lou and Tom were walking next to them and pushing their baby Lux in a stroller."

Or maybe they’ll just get cooties.

Psssttt ! Envoie-ça à ton ami!

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