Christina Milian supports the #FreeBritney movement...

Christina Milian shared the #FreeBritney hashtag on Insta Stories while blasting Britney's 'Till The World Ends' after a sweaty cardio session. It's awesome so many celebrities dare to challenge Britney's current predicament. 

Fun fact: Did you know Britney's ex-husband Kevin Ferderline was a backup dancer for her in the video 'When You Look At Me'? Crazy how she hasn't aged a day since that visual.