Rapper YG was arrested Friday at his Los Angeles home on suspicion of robbery just two days before he is scheduled to perform at the Grammy Awards, officials said.Los Angeles County sheriff's deputies took YG, whose real name is Keenon Jackson, into custody at his Chatsworth home as they served a search warrant.The Compton rapper — whose hits include "Toot It and Boot It" and "Go Loko" — is being held on $250,000 bail ahead of his arraignment Tuesday.