WATCH: Ika Wong's Extended BB21 Sam Smith Interview

Ika Wong, the only pre-season interview that matters.

Incoming "Big Brother" season-21 houseguest Sam Smith chats with ET Canada's special correspondent Ika Wong and reveals which personalities he doesn't want to see in the house. Catch the two-night season premiere on Tuesday, June 25, and Wednesday, June 26, at 8 p.m. ET/PT on Global.