The US singer/actress, who stars in hit Disney Channel series Wizards of Waverly Place and numerous films, is said to be thrilled to receive the invitation, as she's a huge fan of X Factor judge Cheryl Cole.
A source said: 'Selena adores Cheryl Cole and was screaming from the rooftops when she found out she was going to meet her.'
Speaking on ITV's Daybreak recently, Selena called Chezza her 'idol'.
She said: 'I have listened to Girls Aloud but I fell in love through Cheryl, her music and her solo album.'
The star added that she's a 'major, major, major Cheryl Cole fan'.
Selena said it would be 'such a dream' to work with the X Factor judge at some point, if the British singer ever had time to spare.
The starlet is in the UK promoting her recently-released album A Year Without Rain, ahead of performing a date next month at the Hammersmith Apollo in London.
Selena isn't the only singer rumoured to be performing on this year's X Factor live shows.
Madonna, Take That and last year's winner Joe McElderry have also reportedly been lined up for the programme.
Source