The summer has flown by! By weekend's end it will be officially fall. Why must the warmer months leave us just as quickly as they arrived? But if anyone made the most of their summer 2013, it was Rihanna. Every other week, and sometimes even every other day, RiRi was serving a totally different style and all new hair. It was sometimes hard to even keep up!

But as certified fans of this pop diva superstar, we decided to recap all of her looks as we officially close the sunny season. Click through the slideshow to check out each 'do lucky enough to grace this 'it girl's' crown and let us know which one was your personal fave with a note below. 

So at the start of summer, Rihanna sparked a serious head-turning trend. The star redefined pop star edge with a half shaved head paired with long wavy locks. In a poll taken by British hair care retailer Fabriah.com, Rihanna's shaved head hairstyle was named the worst trend of the century. Despite the harsh critique, however, the look took the world by storm. Women everywhere tried the style on for size. Not only did we see women all over the city wearing Rihanna's look, but many celebrities made the bold move and shaved the sides of their heads as well, such as singer Cassie, former Spice girl Mel B, Ke$ha, Miley Cyrus, and rocker Avril Lavigne. Talk about trend setting!

Never one to dwell on a look, Rihanna was quickly on to the next. Her hair and makeup to attend the Chanel Fall Winter 2013-14 show in Paris was the picture of ladylike perfection. Now more subdued and traditional, Rihanna's shaven tresses were nowhere to be seen. Her dark roots paired with her lighter blonde extensions helped to keep the look edgy, but it was the star's outfit that made up for her hair in the edge department. Her super plunging neckline and barely-there bra were covered only by layers upon layers of pearls, quite fitting for Chanel. Here Rihanna created a soft demure moment, still fit for a fashionista.

Who would have ever saw Rihanna's next hairstyle coming? Did you have to pick up your jaw off the floor when you saw RiRi had gone gray like we did? Rihanna's gray hair was a true pop star shocker. Though it was another short-lived look, we weren't sure if this was more gray-haired grandma or silver fox. The jury is still out, but there was no doubt the singer had us all talking. Captioned simply with the word "Brrr" on her Instagram account, RiRi definitely cooled things down color wise with this highly unexpected shade.

One of our favorites, but only seen up top RiRi's crown for just a matter of days, the pop star revealed a super cute short crop of curls via social media to fans. Rihanna's short black curls were such a sweet little departure from her 'good girl gone bad vibe,' that it was refreshing and novel. But of course, this bad gyal isn't going to stay sweet for long. Just as soon as she had snapped the Instagram selfie of the softer style, it was quickly gone. Gotta love how Ri kept us guessing all summer long!

And of course, who can forget the mullet moment Rihanna has been serving for a bit now. Rihanna's mullet was also a bit of a surprise, as the "business in the front, party in the back" style often leaves much to be desired. The star has been putting her own signature stamp on the look, playing with length and volume. In her latest trip to Hong Kong, we can see the diva has added additional extensions for added volume to the back of this look. And at the recent MTV Video Music Awards earlier this month, the look was softer, with just the peek of a mullet tail visible. What's next? Who knows! But thanks for making the summer interesting Ri!

Which Summer 2013 hairstyle this star served up was your favorite? Let us know with a note below!