Lady GagaLady Gaga has been playing stadiums and arenas around the globe for months and will return to the U.S. on July 1 with her 'Monster Ball Tour.' Yesterday, the 'Poker Face' singer announced even more North American dates for 2011 -- but don't say she's working too hard. She addressed rumors her non-stop touring is wearing her out while performing 'Speechless' in Sweden.

"You know when people say, 'Lady Gaga's really tired, she needs to take a break,' I just think about all those times I sang in bars when nobody was singing my lyrics. I'll sleep when I'm dead, okay?" she ranted. Watch the video. >>