Uh oh … Is Demi Lovato mending a broken heart? The singer/actress is known to voice her emotions through her Twitter page, and she was at it again on Tuesday afternoon (Jan. 10).

“The smartest thing a woman can ever learn, is to never need a man,” she wrote Tuesday, after retweeting a famous quote from Marilyn Monroe about how a “wise girl kisses but doesn’t love, listens but doesn’t believe, and leaves before she is left.”

The bac- to-back tweets had Lovato’s fans scratching their heads, trying to figure out if she and ‘That ’70s Show’ star Wilmer Valderrama have parted ways. Although the couple has never confirmed their relationship, the two have been spotted on numerous occasions looking very much so like a young, happy couple in love, even making out in front of his home back in November.

Earlier in the week, Lovato also tweeted about how “loyalty is royalty” when she expressed: “Loyalty is EVERYTHING.. I’m thankful for my friends who stand by my side.”

Could Lovato’s rumored new relationship status be why the star has been feeling down? Just last week, Lovato went on a tweeting rampage, writing: Sometimes it seems like God just keeps throwing crap my way and I get SO angry with him. But there’s never a doubt in my mind He’s gonna pull me through it all. I know you’re there God. But umm… Really dude?”

In recent months, Lovato and Valderrama’s budding romance looked to be on the right path following her stint in rehab in late 2010. Things had been going so well that it was rumored two were shacking up together.

We hope the tweets and latest buzz have nothing to do with their relationship since their celebrity cuteness is something that worked well together, making one beautiful couple!