WARNING: However well your New Year get fit regime is going, there's a good chance that this pic could make you feel inadequate.

Kim Kardashian and Rihanna have teamed up for what could be the greatest celebrity snap of the year so far at a pre-Grammy Awards party in Los Angeles.

The US reality TV queen and the R&B megastar both looked like elegance personified at the star-studded bash - with Kim showing off her new shorter hair and RiRi rocking a stunning up-do.

And even though the pop star appeared to have opted for a bikini top and matching skirt, she still looked just as classy as Kimmy.

The Roc Nation And Three Six Zero party was also attended by Jay-Z, Kanye West, Big Sean, Paris Hilton, Janelle Monae, Nick Jonas, Kylie Minogue and - erm - Natasha Bedingfield.