Are Demi Lovato and Wilmer Valderrama Back Together?

Are the pair, who were rumored to be dating in 2010, back together?

Source: http://feeds.people.com/~r/people/headlines/~3/kOBIaeZC7SI/0,,20542006,00.html

Amy Cobb Amy Smart Ana Beatriz Barros Ana Hickmann Ana Ivanovi Ana Paula Lemes Ananda Lewis