Katy Perry and Rihanna wow at Grammys luncheon... but Christina Milian steals the show in eye-popping cleavage baring dress

 It's usually both Katy Perry and Rihanna that stand out with their array of quirky and risque outfits.

But it was American singer Christina Milian that stole the thunder from both of the songstresses at a Pre-Grammys luncheon at Soho House in West Hollywood today.

The 30-year-old singer stepped out on the red-carpet wearing an eye-popping very low-cut and cleavage-enhancing strapless dress.

 Christina Milian turned heads when she stepped out in this eye-popping cleavage-baring dress at Roc Nation's pre-Grammys luncheon at Soho House today

The pop star poured her curves into the eye-popping tight-fitting attire, which featured green and grey graphic design.

She paired the look with some silver shoes and a grey Hermes Birkin bag.

Rihanna, however didn't disappoint with her also strapless attire.

The newly blonde pop star looked long and lean in a printed corset top and matching billowing trouser.

Keeping with her usual quirky theme, she put on a pair of piano themed stilettos.

The newly single star did not pose with her close friend Rhianna, however inside the party Rihanna cosied up to Milian for some happy snaps.

Also in attendance at the star-studded lunch was Grey's Anatomy star Ellen Pompeo and her husband Chris Ivery.

  The 42-year-old actress showed off the results of her frequent work-outs in a pair of tight leather trousers.

She also went daring with her top half, slipping on a black T-shirt, which exposed her bra worn underneath a denim jacket.

Destiny's Child star Michelle Williams looked like a lady who lunches in a sophisticated black shift dress complete with cap sleeves which she paired with a pearl necklace and some monochrome Sixties-style platform shoes.

 She posed with fellow Destiny's Chilld band mate Kelly Rowland, who went decidedly low-key in a pair of skinny jeans and a olive silk blouse.

Kelly looked gorgeous with her hair out in a natural curl and accessorised with an animal print handbag and some large gold earrings.

Other guests who attended the luncheon included rapper Neyo, singer Snow and Record Producer and X Factor USA judge L.A. Reid.

The Grammys take place tomorrow night and will now be a somewhat sombre affair following the untimely death of music icon Whitney Houston today.

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