Are Demi Lovato and Wilmer Valderrama Back Together?
11/02/2011 AT 04:00 PM EDT
The singer, 19, was spotted smooching former beau Wilmer Valderrama, 31, in the Los Angeles area on Tuesday.
The actress, who split from Joe Jonas in 2010, was linked to Valderrama shortly after the breakup. Later that year, she entered treatment for eating disorders and bipolar disorder.
While Lovato and Valderrama were photographed in a passionate embrace, they remain mum about their relationship.
Lovato's rep tells PEOPLE, "We're not going to comment on this."
A call to Valderrama's manager was not returned.