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The singer was at the annual Jingle Ball in London while wearing the outfit. She's also gone out in a very baring outfit and nearly falling out of her bra, wearing dreadlocks and dressing as one of the figures in a Pablo Picasso painting.
"I am SO EXCITED to perform at @CapitalOfficial Jingle Bell Ball," she tweeted before the event. "I haven't performed in an Arena since my injury. I...
The 27 year-old star is a vocal advocate of equality and has previously slammmed officials in the former Soviet Union over a ban on 'promoting' homosexuality.
Now, she has joined other stars, including singer Lily Allen and writer/funnyman Stephen Fry, in calling for a global boycott of the showpiece sporting event.
She tells British talk show host Alan Carr, "To be honest, I don't think that we should be going to the Olympics at all, I don't know ...