Demi Lovato is summer ready! The former Disney Channel star has kicked off swimsuit season with a mirror video of herself rocking a high-cut, one-piece bathing suit. She took to Instagram on April 7 to share the clip of herself posing in the mirror, while wearing the sleek bodysuit, which showed off the tattoos on her ribs. The ink featured five Roman numerals, which correspond to the birth dates of her family members.