Conversation so far:
who was the winner of americas got talent season 12
The twelfth season of AGT was won by singing ventriloquist Darci Lynne.
who was the runner up for agt s12
The twelfth season of AGT saw singer Angelica Hale finishing second, and glow-light dance troupe Light Balance placing third.

Question: who was the host
Self-contained rewrite: who was the host of agt s12