Conversation so far:
Which songs did Gulzar write ?
Jai Ho (song)
Who was the singer of Jai Ho (song)?
The song features vocals from Sukhvinder Singh
Who else is a singer that sang lyrics for Jai Ho by Gulzar ?
Mahalaxmi Iyer and Vijay Prakash
Who was the director of Aashirwad ?
Hrishikesh Mukherjee

Question: Who is the director he worked with the most as a lyricist ?
Self-contained rewrite: Who is the director Gulzar worked with the most as a lyricist ?