Rihanna has developed into quite the fashion icon over the past few years. What she wears as is discussion-worthy -- as is what she doesn't wear.

Her red carpet attire choices make her a permanent fixture on the "to watch" list at major industry events. We always look forward to what RiRi will don or drape her body in.

In honor of her birthday, we've rounded up RiRi's best red carpet looks and those which have wowed us over the years.

The singer was hot in a strapless, hot pink gown in 2007.

Ethan Miller, Getty Images

At the NRJ Awards back in 2010, RiRi was ravishing in a white, lace-floral Jean Paul Gaultier dress.

Francois Durand, Getty Images

With her Parisian chic bob and low-cut, checked dress, RiRi was sexy and sweet in 2007. Check out that double dose of sideboob. Whoa!

Frederick M. Brown, Getty Images

Never mind that flame-hued hair. RiRi's Stella McCartney gown at the 2011 Met Gala was slinky and showed off sidecheek in a totally Rihanna way. She was the portrait of a goddess.

Larry Busacca, Getty Images

The singer was anything but basic black in this figure-hugging, deep cut and majorly slitted Armani gown at the 2012 Grammys.

Larry Busacca, Getty Images

She was golden and gloved in Givenchy in 2012.

Gareth Catermole, Getty Images

Rihanna doesn't exactly do fluffy and frilly and femme very often, but when she does, she knocks it out of the park, like she did with this architectural Stephane Roland number worn in 2009.

Michael Loccisano, Getty Images

RiRi was red hot in see-through Elie Saab in 2010.

Jason Merritt, Getty Images

This drapey, flowy, white Adam Selman frock was perfect for warm weather appearances back in 2012.

Kevin Winter, Getty Images

This crimson Alaia gown, worn to the 2013 Grammys, was lovely, sprawling and a new standard for Rihanna.

Christopher Polk, Getty Images

She looked the part of a Southern belle in this lemon yellow, ruffly frock back in 2008. The color was to-die-for.

Frazer Harrison, Getty Images

RiRi's blue frock at the 2008 Grammys was darling and not a look she would revisit often. But she was sassy in sapphire.

Frazer Harrison, Getty Images

Even though she was largely covered up in this second-skin, black croc Tom Ford dress at the 2012 Met Gala, it was one of her sexiest looks ever.

Larry Busacca, Getty Images

Here is how it looked from the back, upping the sexy quotient.

Larry Busacca, Getty Images

Ri went poufy and geometric in white Elie Saab at the 2010 Grammys.

Jason Merritt, Getty Images

She demonstrated that she was a goddess in olive green in 2007.

Frazer Harrison, Getty Images

Bringing sexy back.

Frazer Harrison, Getty Images

Shiny in slinky teal! We love the shaggy blonde locks, too.

Samir Hussein, Getty Images

The 'Only Girl (In the World)' went the dominatrix route in Jean Paul Gaultier at the 2013 AMAs. It left little to the imagination.

Jason Merritt, Getty Images

The 2011 Jean Paul Gaultier Grammys gown was deceptively simple. It was totally see-through with its funnel shape.

Jason Merritt, Getty Images

This magenta Marchesa party frock was a shape and length RiRi doesn't normally favor, but the color and style were darling for her.

Fernando Leon, Getty Images

Wrapped in simple, white Adam Selman at the 2012 VMAs.

Christopher Polk, Getty Images

She was a cloud-like vision in this fluffy Marchesa confection in 2010.

Ian Gavan, Getty Images

Head-turning in a soft, short and belted yellow frock in 2008.

David Livingston, Getty Images

A laser-cut, pink and black Marchesa was her choice at the 2009 AMAs, and it was unforgettable.

Jason Merritt, Getty Images