01/10/2012 at 02:00 PM EST
Have Demi Lovato
and Wilmer Valderrama split?
Although the kissy couple
never confirmed their relationship in the first place, Lovato, 19, went from Tweeting her excitement about People's Choice Awards rehearsals to posting about staying independent from the opposite sex.
"A wise girl kisses but doesn't love, listens but doesn't believe, and leaves before she is left," the former Disney starlet, quoting Marilyn Monroe, re-Tweeted one of her followers early Tuesday morning.
Just minutes after the Tweet that appeared to come out of nowhere, Lovato then posted
, "The smartest thing a woman can ever learn, is to never need a man."
The "Skyscraper" singer and former That '70s Show
actor, 31, were reportedly spotted out together just two nights ago, but suddenly Lovato began Tweeting
about "loyalty" and thanking her "friends who stand by my side."
A rep for Lovato had no comment, while Valderrama's rep did not immediately return requests.