Kangana, Parineeti, Alia in their head-turning avatars @KJo's birthday bash (see pics)

Last weekend marked one of Bollywood's joyous nights to mark the celebrations of Bollywood's hot shot producer and director Karan Johar. Among bollywood's glitterati who attended the celebrations to cheer up the birthday boy were Hrithik Roshan, Aamir Khan, Kiran Rao, Nandita Mahtani, Varun Dhawan, Siddharth Roy Kapur, Vidya Balan and many more.The highlights of the evening were Bollywood's dazzling hotties Parineeti Chopra, Bipasha Basu, Kanagana Ranaut, Alia Bhatt, Sonam Kapoor, and Wardha Nadiadwala. While Parineeti Chopra looked all chic in a cobalt blue play-suit, it seemed Sonam Kapoor decided to be dressed in one of her Cannes left-over outfit as she arrived in Bibu Mohapatra.Sajid Nadiadwala's wife Wardha surely gave a tough competition to all the young divas as she looked pretty in white-beige short dress. Take a look at who wore what at Karan Johar's's birthday bash...Sonam Kapoor might have rushed into unpacking her stuff back from Cannes coz' it loked she may have put on a red carpet dress for Karan Johar's birthday party.She chose to wear a Bibu Mohaptra's dress for the event.Kangana Ranaut looked urban chic in a beaded white silk blouse which she beautifully paired up with a metallic Burberry skirt. To complete off her look she donned a pair of Tom Ford sandals.Alia Bhatt who'll be nest seen in KJo's 'Humpty Sharma Ki Dulhania' too attened her mentor's private birthday party Wearing a Zaracreation, a canary yellow neon crop top with pencil fit black leather skirt.She kept to minimal makeup and carried astunning McQueen clutch and black-white checker pumps from Koovs.Vidya Balan slashed out all pregnancy rumours, as she arrived for the night with her husband Siddharth Roy Kapur.She chose to wear a navel-baring white long kurta by Manish Malhotra teamed up with palazzo pants.Parineeti Chopra looks bubblicious in a striking cobalt blue playsuit as she teams up her outfit with white-pink shrug.The attire fit beautifully around her new curves.Nargis Fakhri made a hear-turning arrival at Karan Johar's private birthday bash as she arrived in wearing a Dolce & Gabbana sheer lace dress that gave away clear view of her innerwears. A fashion faux pas was spotted when we noticed view of those nude knickers beneath her black skirt.Kiran Rao chose to don an embellished grey dress by Rohit Gandhi and Rahul Khanna which she completed with matching ballet flats. After a really long-time we are seeing Kiran Rao going for more feminine outfits at such events. Huma Quershi arrived in wearing a short black dress with golden patch work over its collar. She paired up her attire with nude pumps and matching black clutch.Bipasha Basu went in for a sexy look as she arrived in with rumoured beau Harman Baweja, wearing a really short fitted skirt with a white sheer top.She kept her hair poker straight and paired up her attire with orange clutch.