Go (name)! Go (name)! It's your birthday...

[jnglmassiv]

Not for real-real, just for play-play

"Not for real-real, just for play-play"

What’s the origin of this phrase, which has been popping up here and there lately? Sometimes in the form “Go <name>, it’s your birthday, not for real-real, just for play-play”. A line from a song, perhaps?