The 28-year-old star posted the tweets when she was out in New York with a friend, who looked like the late Rehab singer.
She wrote: '*gasp* Amy Winehouse resurrected to party w/ me!!! (seriously, uncanny resemblance)'
However her fans were not impressed with the insensitive comments just days after the star was found dead in London.
She later wrote a message saying: 'Come on, I mean no harm. All due respect. But really the resemblance freaked me out. This was simply the best tribute ever. #RIPAMYWINEHOUSE.'
She later wrote: 'Bedtime. I apologise 2 anyone who might've taken it the wrong way. As a fan, I thought it was cool that she dressed up to honour Amy..
'(ctnd) I had no ill intent, but I understand how it appears insensitive... my bad twitterville. For real. Good night :)'