The singer is in the U.K. to oversee the stage musical Desperately Seeking Susan, which features songs from Blondie - but was left seething when British Airways lost her bags.
She fumes, "I've been wandering around in dirty pants for five days. I'm going to have to go to M+S (British retail store) to buy some new ones. I'm not happy."
The London production begins a run at the Novello Theatre from 12 October (07).
Source: WENN