Ellie Goulding is a marathon running, kickboxing athlete and body builder. She once DJed in a club where a girl wanted to take the piss and threw a bottle at her - Ellie actually took her top off and flexed her muscles, and she was never bothered again in that club.
I've seen her doing stunts and flexing on YouTube, and I saw her IRL in concert. She can walk on her hands, and even when she plays the guitar you see the bulge in her arm.
I once did a poll here with her against Katy Perry, and the voters let Katy beat her up which was probably the most unrealistic thing I ever saw here.
She would lift Cheryl Cole and slam her so hard, Cheryl wouldn't bother to get back on her feet.