Rihanna is as popular for her amazing body as she is for her beautiful voice. While her fans can never have enough of her songs, there are others who simply admire Rihanna for her looks. 

Rihanna recently stripped down to her underwear in an ad shoot for Armani jeans, and needless to say, her curves would make one even forget what the whole ad is all about.

However, in the last few months, Rihanna has parted with her naturally curvy and gone for a weight-loss regime.

The 24-year-old singer started with the famous Five Factor Diet to lose weight, but it seems her weight kept going down even after she stopped dieting.

The Man Down singer earlier this month was reportedly whining about her weight, saying: The Five Factor Diet has gone straight out the window ever since I went on tour. I mean, It's difficult to have any kind of routine when your schedule is that crazy. So I really have no idea how I'm continuously losing weight, she told Ryan Seacrest, in his show on Kiis FM. 

The difference is pretty obvious, if one had to just compare her latest pictures to the ones taken just a few months ago.

It's actually pretty annoying, because now I don't have a butt, and I have no boobs. I already had no boobs to start with. So annoying! and I'm eating everything! she added.

It was believed that Rihanna was encouraged to lose some weight after her father, Ronald Fenty, said she had grown a bit fat from the last time he had met her.

Also, the Bajan beauty is apparently unhappy with her body. During a chat with Kate Garraway on Thursday, she said: I mean I don't think anybody really is 100 percent. I mean you get comfortable with the fact that that's your body and that is what it is - that I had to learn. (Some days) I'm like, 'OK, whatever, I feel fat today,' but what can you really do about it? You have to just accept your body. 

You may not love it all the way, but you just have to be comfortable with it, comfortable with knowing that that's your body, she added.

Rihanna looked much paler than her real skin tone when she arrived in London for the promotion of her debut sci-fi film, Battleship.

Also on Friday, when he stepped out to head for an interview with Daybreak, her skin colour seemed much paler, her blonde locks only accentuating the pale look.

Rihanna not being happy with her looks is quite ironical, considering how often she posts revealing pictures of herself on Twitter and how she loves never wearing pants.

The We found Love singer recently denied rumors of her dating Two-and-a-half Men star Ashton Kutcher, and said she is happy and single.