London: Singer-actress Demi Lovato is a single woman again after reportedly splitting from actor Wilmer Valderrama.
The stars never publicly confirmed their romance, but were caught on camera kissing in November last year following weeks of speculation about their relationship, as reported.
Lovato, 19, took to her Twitter page on Tuesday to post a string of messages relating to relationship issues and re-tweeted a Marilyn Monroe quotation reading, "A wise girl kisses but doesn't love, listens but doesn't believe, and leaves before she is left."
"The smartest thing a woman can ever learn, is to never need a man," she added.
Lovato, who was in the rehab early last year battling eating disorders and a breakdown, has previously dated pop star Joe Jonas.