Video: Lady Gaga Performs with Kid Cudi

The spectacular Lady Gaga kicked off her “Monster Ball” tour in Montreal, Canada, on Friday (Nov. 27). Lady G. opening act Kid Cudi performed his “Poker Face”-sampled hit “Make Her Say.”

“Who is on my f***ing stage?!” she asked before introducing Cudi. “You listen to me, Kid Cudi. If you’re ever f***ing late to my show again, I’m gonna kick your ass.”

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