This week, it seems like girls just wanna have fun!

Whether at a Fashion Week event or an awards show, stars like Rihanna (who typically opts for over-the-top) and Emma Watson (tamer when it comes to party looks) chose playful ensembles in teal blue or with strategically placed cutouts.

Photo(s): Getty Images (2) | WireImage

BLUE BELLES:

"Gossip Girl" star Blake Lively certainly gave guests at the 2011 Elle Style Awards on Feb. 14 in London something to talk about in an Emilio Pucci dress from the Spring 2011 collection. Golden accents like a thin halter strap and stack of bangles were a chic choice. And check out those fuchsia Christian Louboutin peep-toe pumps!

Rihanna went with a loud floral and turquoise tulle Christian Dior Couture gown for the Brit Awards on Feb. 15 in London. But the quirk didn't end at the dress; the "Good Girl Gone Bad" singer added vibrant Christian Louboutin heels and Solange Azagury-Partridge rings.

At the Los Angeles premiere of "Rango" on Feb. 14 actress Isla Fisher paired a festive electric-blue Temperley London mini with satin metallic accessories and Lulu Frost chain-link earrings.

Photo(s): Getty Images (2) | StarTraks


CUT IT OUT:

"Harry Potter" actress Emma Watson received the Style Icon award at the Elle Style Awards 2011 wearing a silver Hakaan cutout dress, nude patent-leather heels and slicked-back locks.

Emma Roberts toasted Michael Kors at his 30th-anniversary bash wearing the designer's cutout LBD. The actress -- who was spotted at Jenny Packham on Valentine's Day -- added suede booties to complete her dark ensemble.

Host of the evening, "it" girl Alexa Chung wore a YSL short-sleeve blouse paired with a ruffled skirt to the Elle Style Awards. YSL pumps matched the distinctive black fingerprint motif.

If you want to see more of London Fashion Week, check out this PopSugar video on Temperley London runway below: