As if Olympic sensation Simone Biles didn't already have plenty of reasons to smile -- like maybe her four gold medals and one bronze -- she's got another reason now.
Actor Zac Efron -- fulfilling teenage crush goals everywhere -- popped over to Rio to find Biles and plant a surprise smacker on her.
"He kissed me on the cheek, just letting y'all know," Biles shared in a tweet.
