Actress-producer Malaika Arora Khan, also known for her dancing skills, says there is nobody like yesteryear's dancing diva Helen.Asked how she reacts when people compare her to Helen, who is married to the former's father-in-law Salim Khan, Malaika told IANS: "I don't think there is any comparison. If anybody says something, I take it as a huge compliment because at the end of the day there is nobody like Helen aunty. She is unbelievable on screen."While Helen remains Malaika's all-time favourite, the latter is also all praise for actress Deepika Padukone. "For me, my favourite is Deepika Padukone. She is amazing, she is very good and is a brilliant actor. She is fantastic and has come a long way," said Malaika, who impressed many with her dance moves in the song "Chaiyya chaiyya" from Shah Rukh Khan-starrer "Dil Se..".