Madonna has appeared to take another swipe at Lady Gaga, saying ``imitation is the highest form of flattery''.
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Madonna takes another swipe at Lady Gaga
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Lady Gaga pushes back against charity fraud allegations
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Instagram reprimands Madonna
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Lady GaGa amputated leg
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Lady Gaga says she feels like a loser
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Lady Gaga branded former assistant a 'hood rat'
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Kylie Minogue praises Lady Gaga
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Lady Gaga checks out Carole King and James Taylor
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Lady Gaga takes another fall on stage
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Madonna 'impresses Brazilian politician'
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Janet Jackson loves lady GaGa!
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Madonna holds dance auditions for upcoming tour
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Madonna dazzles at Super Bowl
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Lady Gaga is just like us!
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Lady Gaga treats fans to burgers
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Grace Slick is no fan of Lady Gaga
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Madonna working on new album