The 31-year-old singer said she is a huge fan of the 'We Found Love' hitmaker because she is a minx, reported Contactmusic.
"I would have to go for Rihanna. I like a bit of a minx," she said when asked about her secret celebrity girl crush.
Harding split with long time partner Tom Crane without divulging much reason behind it. She went to rehab to be treated for depression and alcohol and sleeping pill addictions in 2011 after her split.