Why So Serious? See How the Stars Are Having Fashion Fun on Instagram

Who says dressing up has to be a highbrow activity? This week the stars were all about keeping fashion fun. While Rihanna wasn't afraid to take a spill in skis, Lupita Nyong'o spread her wings with a butterfly headpiece.

After all, though great style is serious business, it's nice to see Hollywood still has a sense of humor. See this week's best photos, and don't forget to share the love and follow POPSUGAR Fashion on Instagram, Facebook, and Twitter!

Lupita Nyong'o

Lupita Nyong'o

Lupita had a hair-raising reaction to this butterfly headpiece.

Lindsay Lohan

Lindsay Lohan

From Sarah Jessica Parker's flirty floral dress to Lady Gaga's full-body fishnet, this group tried out every style.

Emmy Rossum

Emmy Rossum

Emmy looked chic at the beach in this white one-piece.

Nicole Richie

Nicole Richie

Nicole was one lucky lady.

Vanessa Hudgens

Vanessa Hudgens

Vanessa's boho style was perfect for life on the road.

Lena Dunham

Lena Dunham

Lena wasn't afraid to wear her show on her shirt.

Rihanna

Rihanna

Rihanna may have taken a spill, but at least she did it in style.

Taylor Swift

Taylor Swift

Taylor and Lorde coordinated their outfits for a day at the beach.

Lorde

Lorde

Lorde rocked this dramatic layered look in Stockholm, Sweden.

Hailee Steinfeld

Hailee Steinfeld

Hailee shared these chic snapshots from a recent photo shoot.

Joy Bryant

Joy Bryant

Joy was the most stylish snowboarder we've ever seen.

Kerry Washington

Kerry Washington

This dazzling ring was Kerry's brightest accessory at the NAACP Image Awards.

Mindy Kaling

Mindy Kaling

Mindy mastered layering in her bright blue-and-green ensemble.

Sophia Bush

Sophia Bush

Sophia stood out in the crowd in a Winter white dress.

Sarah Hyland

Sarah Hyland

The (modern) family that dresses together stays together.

Kat Dennings

Kat Dennings

Kat was dressed to the nines with costar Beth Behrs.