Rihanna and Leonardo DiCaprio aren't officially dating yet, but she allegedly wants to change him right away.

We reported last time that the 40-year old actor asked her not to get a tattoo until she falls in love.

"She's a woman of her word and she's sticking to that," a source told Hollywood Life,

After making a promise to Leo, now Riri may be the one asking him to make a vow for her. According to OK magazine, the 36-year old singer wants "The Wolf of Wall Street" star to lose weight because she thinks he isn't fit like her ex-boyfriends Chris Brown and Drake.

"Ri's got extremely high standards when it comes to who she sleeps with and Leo falls out of this category because he's a lot more flabbier than her usual lovers," a source told the website.

Most of Leonardo DiCaprio's ex-girlfriends don't care what he looks like, including Toni Garrn who accepted him despite his huge belly and bushy beard.

"Leo thinks it's all highly amusing. He's never had a girl tell him what to do, so you can imagine how much he's loving it," an insider revealed.

The website also reported that the "Diamonds" singer even hired a trainer to help her rumored boyfriend get a six-pack.

Some people find Rihanna and Leonardo DiCaprio an odd pair because they both have a strong personality and like being free.

However, they seem to be enjoying each other's company and were even spotted together in several occasions. It's surprising that the two suddenly hook up after Leo broke up with Toni and Riri quit seeing Drake.

"After his breakup, Leo started texting Rihanna again. They decided to have some fun. He's a free man again. So he's back into the field full swing," a source revealed to Us Weekly.

Based on that statement, they have been seeing each other even while Cap was still dating the supermodel.

"Neither one is looking to make this anything more than fun. He's into her, and they're enjoying it. This is a no strings kind of deal," an insider added.