Updated On: 18 September, 2012 08:32 AM IST | | IANS
Pop diva Madonna has appeared to take another swipe at Lady Gaga, saying 'imitation is the highest form of flattery'.
The singer dedicated her track "Masterpiece" to the younger star during a performance in Atlantic City, New Jersey, over the weekend, and appeared to accuse her of imitating her, reports contactmusic.com.

Madonna and Lady Gaga. Pics/Santa Banta