The promotion ties to the Miley and Max clothing range at Asda's George that launched in September, designed by noted fashionista Max Azria, and "inspired" by the Miley Cyrus look.
Cyrus, who is also known by her on-screen alter ego Hannah Montana, will be in the country to publicise the clothing range, and Asda is giving her "biggest fan" the chance to meet her.
Open to those aged 16 and under only, hopefuls must complete an online form and include a picture to back-up the biggest fan claim.
Called at short notice, the competition closes this Sunday 7 November.
