Who's that star kicking it in gym gear and a pink trucker hat?
Remember, you must be a registered user of TheInsider.com to participate. Check out the photographic evidence and leave your best guess in the comments section below. Tune in to "The Insider" on TV tonight and your name may be the one called out on the air -- but only if you guess the mystery star!
Here's a hint: She's a musical diva.






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