Kim, RiRi and Beyonce highlight this gallery of sexy starlets showing a bit of side boob.
New mom Kim Kardashian flaunted her post-baby body (and side boob!) in this selfie she posted to her social media accounts in October.
Not one afraid to show a little skin, Rihanna flashed some side boob while showing off her denim ensemble.
Fans got a glimpse of Beyonce's side boob while she lunched at Coste Restaurant in Paris, France on April 23, 2011.
Supermodel Gisele Bundchen flashed some side boob in her revealing dress at the Metropolitan Museum of Art Costume Institute Gala, Superheroes: Fashion and Fantasy, on May 5, 2008 in New York City.
Model Irina Shayk showed off her perfectly tanned side boob when she arrived at the 2012 Vanity Fair Oscar Party at Sunset Tower Hotel in West Hollywood on February 26, 2012.
Actress Jessica Biel showed some subtle side boob during the 79th Annual Academy Awards at the Kodak Theatre in Hollywood.
LeAnn Rimes wore such a teeny bikini while on the beach in Malibu on August 27, 2011 that she showed plenty of side boob.
Petra Nemcova flashed ample side boob while at the YM Magazine celebration of the April MTV Issue at Splashlight Studios in New York City on March 4, 2003.
This is more than just a little side boob! Actress Taylor Momsen let it all hang out backstage at Donington Park in Leicestershire, UK in 2011.
Chalk this one up to a bona fide nip-slip. Mariah Carey flashed her side boob at the 2003 World Music Awards in Monaco.
'The Notebook' beauty Rachel McAdams showed side boob at the UK premiere of 'Morning Glory' at Empire Leicester Square on January 11, 2011 in London, England.
Nicole Richie flashed her black lacy bra -- and side boob -- in Hollywood on July 10, 2013 while filming a segment for 'Extra'.
Peta Murgatroyd was a vision of red at the 2013 ESPY Awards in Los Angeles, but also flaunted a little side boob.
Joanna Krupa never shies away from side boob and proudly showed off her assets at the Hard Rock Hotel in June 2013.
Rosie Huntington-Whiteley bared plenty at the LACMA 2012 Art + Film Gala on October 27, 2012 in Los Angeles.
Kirsten Dunst attends the Costume Institute Gala for the "PUNK: Chaos to Couture" exhibition at the Metropolitan Museum of Art on May 6, 2013 in New York City and opted for a side boob.
'Teen Mom' reality star Farrah Abraham busted out of her bikini at the Sapphire Pool and Day Club in Las Vegas on June 15, 2013.
Miley Cyrus showed side boob at the Clive Davis & The Recording Academy's 2013 Pre-Grammy Gala And Salute To Industry Icons in LA on February 9, 2013.
Olivia Wilde flaunted side boob through her sheer dress at the Cowboys & Aliens UK film premiere in London, England in 2011.
Diane Kruger also went with sheer side boob at the premiere of 'The Host' in Los Angeles on March 19, 2013.
Dancer and actress Julianne Hough walked the pink carpet showing off side boob at Greystone Manor Supperclub on April 18, 2012 in West Hollywood.
Look close -- there's side boob. Katy Perry's nude outfit almost masked her side boob as she arrived at the 52nd Annual GRAMMY Awards on January 31, 2010 in Los Angeles.
'Harry Potter' star Emma Watson showed minor side boob at a special screening of 'The Perks Of Being A Wall Flower' on September 13, 2012 in New York City.
Mischa Barton bared a lot of skin, including side boob, at the gala dinner of 'Women for Women International' at The Guildhall on May 3, 2012 in London, England.
And it's happened too many times to count, but Lindsay Lohan went with side boob at the 2008 MTV Video Music Awards at Paramount Pictures Studios in Los Angeles on September 7, 2008.