Lady Gaga flashes bum on stage hits back at Madonna

The war between Lady Gaga and Madonna has hit rock bottom. Following the Queen of Pop's repeated rear-flashing on her MDNA tour, Gaga exposed her own g-stringed derriere to 13,000 people at her Born This Way Ball in Helsinki, Finland.

• 2012-08-30T23:08:21+00:00
• Duration: 00:28

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Lady Gaga, concert, Queen of Pop, MDNA, Madonna, stage, Lady Gaga flashes bum on stage, hits back at Madonna , flashes bum, Born This Way Ball, Helsinki, Finland, celebs, celebrities, 2012, live concert