A$AP Rocky

According to Shure's artist page, Shure endorsed rapper, A$AP Rocky uses Shure's ULXD4Q Wireless Vocal System.

This monitor can be seen on his left, next to the bottles.

These monitors can be seen on the photo, next to the main monitors.

According to Shure's artist page, Shure endorsed rapper, A$AP Rocky uses Shure's PSM 900 Personal monitor system.

He uses it as a personal computer, and for writing songs too.