Designer Hassan Sheheryar Yasin (HSY) really knows how to celebrate extravagantly. He recently celebrated his birthday and it looks like many of Pakistani fashion and entertainment's biggest names made it a point to party hard in desi couture at the designer’s birthday. HSY fondly called the event 'Sheroo's Mastt Mahol Birthday' and it was held at the HSY Mansion in Lahore. The party was attended by many of his star friends. Singer Ali Zafar was at the party along with his wife Ayesha Fazli. Lollywood actor Resham was also seen in an orange sari. Designers Hussain Rehar and Mohsin Ali Tawasuli were there as well. Model Mehreen Syed also made it to the bash. HSY took to Instagram to thank everyone who attended the party and made it special. He also gave us a glimpse at the event decor and the oh-so delicious looking food spread. The food was done by Sweet Affairs and Crave – The Caterers. The event marked HSY turning 45 years old this year.