Katy Perry relies on an autocue to help her remember lyrics live - because she's often caught out as she daydreams onstage.
The I Kissed A Girl hitmaker demanded a teleprompter for her recently-wrapped California Dreams Tour after learning her pop star pals use the device, and now she admits she can't get by without it.
She tells Perez Hilton, "I do (forget) tiny, tiny (song sections), or I change a word. I do use it, now that I have it. I never had it before and I never had a problem but now it's more psychological, I think. I'm singing 15 songs in a night.
"If I've had a really long day, it's such a security blanket. For instance, if I've overworked myself or underslept, sometimes I just blank. Or if I've got something big the next day like an awards show or TV (appearance), I'm thinking about that typically when I'm onstage, so this is really helpful. I've had a lot of friends say they've had it, so I was like, 'Well since we're doing arenas this time, we're gonna have one of those!'"
The singer also asks her funnyman husband Russell Brand to write down special "keywords" she can use during her shows to impress local audiences.
She adds, "Sometimes I'll have keywords - because, you know, my husband's English so he knows a lot about Great Britain, and he's toured a lot himself in Scotland, Ireland and all kinds of places. (He tells me about) different football teams."