Rihanna was spotted partying in London last night after attending the BRIT Awards at the O2 Arena.

The 24-year-old had changed from the stunning gown she wore to strut down the red carpet, into more comfortable attire. RiRi had snubbed the official BRIT Awards after-parties to spend the night at celeb hotspot Mahiki in central London.

While making her way out of the club in the early hours, what looked like a red lipstick mark was visible on her neck, leaving fans wondering what she was getting up to inside the venue.

RiRi wore large glasses to hide her tired eyes after performing her smash hit single 'We Found Love' at the ceremony hours before.

Check out the pics of RiRi in the gallery below.

Rihanna spotted partying after BRIT Awards with kiss mark on neck...