Today, my family and I found a stack of old CDs with all kinds of embarrassing music including Dig It from the Holes movie, the Cha Cha Slide, and lots of Britney Spears. We (slash I) had a great time dancing around to the old tunes, remembering (most of) the words. Even my niece, Bailey, thought I was a little weird, but that's ok - I had a great time.
Don't be afraid to embarrass (or make an ass of) yourself; sing at the top of your lungs, dance like a spastic person, and don't worry about what everyone else is thinking. "Those who mind don't matter, and those who matter don't mind."