The popstar arrived back from a quick stop-off in Glasgow, where she was promoting her new single, 'I Will Never Let You Down', to showcase her music at a special invite-only gig at Mode nightclub in London.
Rita, who is dating DJ Calvin Harris, looked to be in a good mood as she rocked her hair back and forth while giving fans a preview of songs that are to appear on her second studio album.
The songstress also belted out her chart hits from last year including 'R.I.P', 'Hot Right Now' and 'How We Do'.
Rita closed the set with her current single, which stormed in at number one on the Vodafone Big Top 40 charts this week. Midway through her performance, she flung on a denim jacket given to her by a fan, which was decorated with the words of her title song.
The celebrations didn't stop after the concert either, as Rita later showed off a personalised chocolate bottle, which she received as a gift.
The 23-year-old, who takes on the role of Christian Grey's sister Mia in upcoming movie Fifty Shades of Grey, said last night: "#Iwillneverletyoudown thank you for my chocolate bottle!! Awesome I'm about to bite into it!!!"
Earlier this week, Rita was in a celebratory mood after learning of the success of 'I Will Never Let You Down' and flashed her side boob while showing off her bare back.
Also this week, Rita released the Switch Remix of 'I Will Never Let You Down', which is available on Pepsi MAX's Beat's of the Beautiful Game album, ahead of the 2014 World Cup tournament.
The visual album combines 11 songs and short films that captures the sights and sounds of football. Rita stars on the album alongside Kelly Rowland, Janelle Monáe, Don Omar, Santigold and Timbaland. Meanwhile, directing credits for the short films include the likes of Spike Lee and Idris Elba.
Beat's of the Beautiful Game is released internationally on 9 June and is available for pre-order on iTunes now.
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Watch the music video for 'I Will Never Let You Down' below: