By Leah Ornstein,Just because they are rich, famous and have extensive access to the hottest designer duds, doesn't mean that Hollywood's hottest stars always make the best choices when it comes to their attire!From the hottestSuper Bowl XLVIIIparties to swanky Hollywood charity events, celebs were dressed torock and shock this week.Find out who were the style winners and sinners inPopdust's weekly feature.
Worst:Rihannais usually a step above the rest when it comes to her sense of style but this shiny, lameLanvinlook at her MAC promotional event didn't quite hit the high note.
Best:Cate Blanchettcontinued to reign the red carpet at theAACTA Awardsin a stunning metallicGivenchygown.
Best:Halle Berryshowed off her post-pregnancy bod in a chain embellishedAllSaintsdress at the Acapulco Film Festival.
Worst:Many people liked thisDavid Komacutout dress onGwyneth Paltrowat theHollywood Stands Up to Cancerevent, but I thought it just drew attention to her too-skinny and shapeless body.The lack of makeup also made her look washed out.
Best:Emma Robertslooked perfectly put together at theHollywood Stands Up to Cancerevent, pairing aKate Spadeembellished sweater with a navy skirt and metallic Casadei heels.
Best:Selena Gomezlooked effortlessly chic in a cutoutBCBGjumpsuit at theHollywood Stands Up to Cancerevent, pairing the figure-flattering ensemble with a cute clutch and matching heels.
Best:Who cares if it's winter?Jessica Albahit theHollywood Stands Up to Cancerevent in a flirtyRalph Laurenfrock, which she contrastingly paired with black sandals and a matching purse.
Worst:Drew Barrymoreneeds to flaunt her bump in maternity wear, not hide it by wearing regular clothes in bigger sizes!The mom-to-be hit theHollywood Stands Up to Cancerevent in a colorfulGiulettadress which failed to flatter her beautiful body.
Best:Reese Witherspoon awesome orange Roland Mouret cocktail dress stole the red carpet show at Hollywood Stands Up to Cancer.
Most Ridiculous:Diane Kruger usually aces the red carpet, but her Erdem ensemble at the Hollywood Stands Up to Cancer event was most definitely a floral fashion faux pas.
Drew Barrymore needs to flaunt her bump in maternity wear, not hide it by wearing regular clothes in bigger sizes! The mom-to-be hit the Hollywood Stands Up to Cancer event in a colorful Giuletta dress which failed to flatter her beautiful body.
Best:Christina Aguilera showed off her slimmed down figure at the Hollywood Stands Up to Cancer event by pairing Frame Denim skinny jeans with a Theory shirt, topping off the look with a Eugenia Kim hat.
Most Ridiculous:Not exactly a coordinating couple at the Grammy Beatles tribute, Katy Perry was a caped crusader in Dolce & Gabbana while boyfriend John Mayer appeared to be wearing khaki pants with a skirt attached paired with lumberjack gear.
Most Ridiculous:Which outfit was worse: That belonging to Miley Cyrus or Madonna? The duo were offensively fashioned at Miley Cyrus: MTV Unplugged, with Cyrus going for the rap-chick cowgirl look, while Madge added glamour to her western wear.
Most Ridiculous:Clearly not phased by his Grammy hat backlash, Pharrell Williams hit the Grammy Salute to the Beatles the next night wearing his huge, Vivienne Westwood hat with a Lanvin fur coat, Chanel necklaces, a cardigan, jeans and unlaced leather boots.
Best:Beyonce definitely scored at the DirecTV Super Saturday Night party, hitting the stage in a sexy and sheer Roberto Cavalli gown.
Worst:This is Jackie Cruz from Orange is the New Black at a Super Bowl Party. Inspired by the sport, she wore this absolutely hideous ensemble, which included lace up boots and thigh high socks.
Most Ridiculous:I mean, basketball, football, what's the difference? Spike Lee represented the NBA at the DirectTV Super Saturday Night party, clad in a truly vibrant yet disturbing ensemble.
Most Ridiculous:Lil Mama went to Urban Outfitters one day and saw this rug. She thought to herself: Wow. That would make a really pretty outfit. So she brought it to her local dry cleaner and voila. Her colorful ensemble at the Talent Resources MAXIM Big Game Weekend party.
Best:Shay Mitchell steamed up the DirecTV Super Saturday Night party wearing a slit black skirt with a leather crop top and metallic heels.
Best:Kate Mara rocked a red hot J. Mendel shift dress to the 3rdAnnual NFL Honors in New York City.