Katy Perry asked a footballer out on live TV.

The 'Dark Horse' singer was asked to make predictions during 'College GameDay' on ESPN at the weekend and picked the winner between Oklahoma Sooners and TCU Horned Frogs based on hunky quarterback Trevor Knight, 21.

She said:''I'm picking this one based on looks. Trevor Knight, do you hear me?

''The quarterback for Oklahoma, we don't mind. So I'm going to go with him. Trevor Knight, call me!''

Trevor hasn't responded publicly to Katy, 29, but his older brother Tyler admitted the sportsman was ''flattered'' by her comments though he isn't interested as he has a girlfriend.

However, the 23-year-old farmer told TMZ he would love to take Trevor's place - but he admitted he is the ''black sheep'' of the family and doesn't have much in common with his younger sibling, or the footballer's twin brother Connor.

Meanwhile, the 'Roar' hitmaker - who was previously married to Russell Brand and dated John Mayer - is enjoying life on the road on her 'Prismatic' tour and was particularly excited to be in Memphis, Tennessee, yesterday (05.10.14) as she was to receive some special tuition.

She tweeted: ''SO happy that my tour gets to learn the gift of Transcendental Meditation today! Imagine the[energy] that's gonna come out of us moving forward!

''Also SO happy to be in MEMPHIS, my Pappa's hometown! Gonna get some ribs and soak up some blues after...(sic)''