The bedroom sessions: Rihanna flaunts her figure in see-through bra and silky pyjamas as she enjoys a drink during late night stint in recording studio

Her fans have urged the star to speed up work on her highly-anticipated new album.

However, Rihanna seemed more than relaxed as she hit the recording studio for a late night session on Friday.

The stunning pop superstar, 27, appeared to be dressed for bed as she arrived for a stint in front of the mic at 3.30am.

Keeping you up? Rihanna seemed more than relaxed as she hit the recording studio for a late night session on Friday

Stepping out of the New York-based studio in the early hours, she shocked onlookers by sporting a see-through bra under silky pink pjyamas.

Showing off her taught stomach and tattoos by leaving her gown open, the star carried a drink as she strutted along the street in a pair of retro fluffy heeled slippers.

Just in case passers-by didn't realise who she was as she made her way across the road, she wore a necklace with her surname 'Fenty' on it.

Guiding her into the studio was a beefy security guard, who seemingly chose to match his charge by wearing a pink polo shirt.

The stunning pop superstar, 27, appeared to be dressed for bed as she arrived for a stint in front of the mic at 3.30am