Kelly Clarkson is teaming up with teen star Demi Lovato for a new collaboration. The pop stars duetted on `Have Yourself A Merry Little Christmas` at New York`s Z100 radio station`s Jingle Ball concert on December 9, Daily Express reported. "Girl (Demi Lovato) we have got to sing together again! You have such a powerful and beautiful voice! I love your spirit," posted Clarkson on Twitter. Now the former `American Idol` winner has revealed plans to team up with Lovato again on a new tune. "It`s a song a friend of mine wrote. Its killer and I`ve been wanting to sing it for a while. It`s very like urban, pop/rock, and we both like that. It`s my normal anthem, shove it in your face (type of song)," Clarkson added.
