It's not even Thursday, but we couldn't help but post a throwback!
Sometimes movie and television roles just aren't enough for celebrities. In fact, before many of these peeps were mega famous, you probably saw them in a music video or two.
If it's not ringing any bells, you're not alone. We had to dig deep to find these gems.
Record labels may not be shelling out the same massive music video budgets they once did, but just because they've migrated from the big screen to the computer doesn't mean we've forgotten about them entirely.
These sneaky celebs might not have wanted their past to resurface, but they're so fun, we just had to share!
Click through our gallery below for the best celebrity music video cameos ever!