Add Yahoo as a preferred source to see more of our stories on Google. Jessie J is back at it again with some serious gains on Instagram. The singer, 33, gave her followers a full workout routine video ...

For years, I’ve been in awe of Jessie J. Not only does the singer have an amazing voice, but she has a super strong body to match. The way she’s able to belt out tunes and perform a full-on dance ...