Alison Goldfrapp was so starstruck she "couldn't get off the chair" or speak when she met Madonna.
The 'Rocket' singer admitted she finds it hard to meet other famous people - which can lead to her accidentally looking rude.
She explained: "I'm always quite starstruck. The first time I met Madonna, I couldn't actually get off the chair to shake her hand. It must have appeared really rude but it was because I was totally gobsmacked that she'd just walked in and made a beeline for me.
"I don't think I actually managed to get any words out; I just sort of froze and grinned inanely."
Goldfrapp - which also includes multi-instrumentalist Will Gregory - released their latest album 'Head First' last month.