Romeo and Jordin Sparks - The Hangover Part II - Are they dating?

Jordin Sparks and Romeo were together for the premiere of 'The Hangover Part II' in Los Angeles.

They tweeted a picture together, which made me think: are they dating?

I was going to say Romeo isn't Lil anymore, but beside Jordin and her 'I Am Woman' heels, he's still Lil!