The Teenage Dreams singer pops against the black carpet in a Fausto Puglisi outfit that taps into this season's big trend: punchy colors like hot pink, aqua, tangerine and anything neon, natch! Click through to see which of your fave celebs are going bold 'n' bright this spring...
No doubt, Effie Trinket would approve of this backless Bill Blass gown in eye-blasting lemon at the Hunger Games premiere.
The fashion's so bright, she's gotta wear shades. Wonder if B. has an extra pair she could lend us as we take in this neon pink sweater?
Her gams are great but it's this neon orange Prada number that makes makes everyone sit up and take notice at the Venice Film Festival.
Color her extra happy! Jess visits the set of Good Day L.A. sporting bright turquoise and orange.
The This Means War star struts her stuff in a Michael Kors hot pink mini that distracts from any belly bumping.
The Help star and awards season darling shines extra brightly in this vivid orange Hervé L. Leroux dress at the NAACP Image Awards.
The forecast is sunny as Heidi Klum hits Elton John's AIDS Foundation Oscar viewing party in this cheery Atelier Versace mini.
RiRi's making waves in this aqua Antonio Berardi outfit at the London launch of her latest fragrance, Reb'l Fleur.
The actress is impossible to miss dressed in a hot pink Michael Kors dress at the designer's Fall 2012 fashion show.
Sometimes one pop of color just isn't enough as the singer proves in this two-tone number at EIF's women's cancer research benefit.
Orange you glad to see the actress in this slinky Tibi gown at the Women In Film pre-Oscar party?
Posh shows her true colors, stepping out to support The Eva Longoria Foundation in a teal dress of her own design.