Bipasha Basu considers friendship as one of the purest relationship ever, while Arjun Rampal feels blessed to have some of best buddies in the world. With world celebrating Friendship Day Sunday, B-town celebrities took to micro-blogging site Twitter to wish their best pals.

Here is what they have to say:

Karan Johar: Happy Friendship Day to all of you...sustaining friendships is a full time job which not everyone is qualified for! I hope you are.

Bipasha Basu: A relationship so pure and necessary for everyone! Friendship! I love all my friends...

Farah Khan: Happy friendship day to all my tweet pals out here. May you have a super restful Sunday. Love you. I'm off to spend the day with my kids.

Arjun Rampal: My dear Twitter friends wishing you all a happy friendship day. I am blessed with some wonderful friends, tonights gonna be a good night.

Madhur Bhandarkar: A real friend is one who walks in when the rest of the world walks out. Happy friendship day.

Farhan Akhtar: Happy friendship day to all yaars, dosts, sahelis, mitras, buddies, pals and amigos.

Shreya Ghoshal: Happy Friendship Day

Neha Dhupia: Happy friendship day all...I love my friends, I really really do!

Tusshar Kapoor: Happy Friendship day to all my friends here on twitter!