Conversation so far:
What was a major product endorsement ?
Ai has worked on four major Coca-Cola TV commercial campaigns.
did he have any big moves in his carrer?
Ai's most high-profile work for a TV drama was the theme song for 2006's primetime drama Team Medical Dragon.
did he only do song work?
Ai has featured as a spokesperson, or has her music featured, for many products.

Question: did she ever sing with anyone else?
Self-contained rewrite: Other than the endorsements, did Ai (singer) ever sing with anyone else?