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Oh, Delta Goodrem .... you are one lucky lady to have scored the sexiest JoeBro of all, 18-year-old Nick! In bowling terms, that would be a strike!

The young crooner and his 26-year-old ladylove walked out of Pinz Bowling Center in Studio City after hitting the lanes. Looks like Nick has a custom bowling ball bag, too!

Nick and Delta have been seeing each other for over three months now. At first, the young JoeBro was saying their relationship was strictly professional. But now ... um, yeah.

See more of the cute couple ... after the jump.