Justin Timberlake may be in a relationship with Jessica Biel, but the SexyBack singer reportedly can't get Olivia Munn out of his head.

JT, 29, is so into Ms. Munn, 30, that he's been texting her several not-so-innocent messages as recently as December, according to Life & Style.

As for what the messages said, an insider tells L&S:

    “One said, ‘My relationship is basically over.’ The other said, ‘I’m thinking about you.’ There was part of a third that said something like, ‘You don’t understand how hard it is.’ I didn’t see that entire text, so I’m not sure how that sentence ended.”

The insider adds that Olivia is "super flattered" by the attention, but "she's not expecting it to go anywhere, but she'd love it if it did!"

Olivia Munn's rep has not been available for comment.