Britney Works Belly, Then Works Fans

4/22/2008 9:05 AM PDT BY TMZ STAFF
For the first time in a while, Britney Spears lost that glazed over look and actually looked happy.

Showing signs of progress at Bally's, Brit had paps cheering her on as she did crunches -- and the poster child for conservatorships even took time to show a fan some love on her way out. Looks like 5150 ain't nothin' but a number.