Maybe he took the fall for The Biebs?!

Justin Bieber's pal Lil Za was arrested this morning for cocaine possession at the singer's Calabasas mansion after cops executed a search warrant connected to last week's egging incident and stumbled on the drug.

A rep for the L.A. County Sheriff's Dept. confirmed that the 19-year-old was arrested and taken into custody for FELONY narcotic possession.

Although authorities were at the residence to collect evidence in the vandalism investigation against the pop star, they didn't have to search very hard to make the drug discovery!

"Cocaine was in plain view when they were looking for other evidence," the rep told reporters during a press conference.

The rep also confirmed that there were multiple people home at the time of the raid, including Bieber, but that the chart topper wasn't questioned at that time by authorities.

Bad day to be part of the entourage, apparently!