Heidi Klum, Tom Hanks, and Rita Wilson play dress-up and sing karaoke to raise funds for UNICEF; Santa Monica Museum of Art's PRECOGNITO Gala draws Emmy Rossum, Ben McKenzie, and a Mary-Kate-less Ashley Olsen to preview the INCOGNITO art exhibition; Lana Del Rey, Quincy Jones, Owen Wilson and Jared Leto hit up the UCLA Institute of the Environment and Sustainability—get all of this and more and to see who got a head-start on weekend fun on Thursday in L.A. in this edition of Last Night's Parties.

[Heidi Klum, Tom Hanks, Rita Wilson via]