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Rihanna's blushes at Kutcher quip

Rihanna brought a very special guest along to the star-studded Time 100 gala - her mum.

And the Rude Boy singer - who looked stunning in a hot pink satin gown - revealed Monica Braithwaite used the opportunity to make a cheeky jibe about her daughter's rumoured fling with Ashton Kutcher.

Rihanna told Twitter followers: "Well... 2nt consisted of us singing Bob Marley, drinkin Vintage Scotch, and my mom thinkin a joke abt Kutcher was appropriate! #Thxtime100".

The star appeared to have no hard feelings towards her mum, however, tweeting a photo of the pair enjoying a mother-daughter cuddle at the event.

Rihanna sparked rumours she had got together with Two And A Half Men's Ashton after she was snapped leaving his home in the early hours last month.

Other stars snapped at the Time event at New York's Frederick P Rose Hall - celebrating the most influential people in the world - included Tilda Swinton, Tyra Banks, Claire Danes and Kristen Wiig.