How do you follow up a Best Actress Oscar win? For Meryl Streep, it seems a burger will do! The actress (who won for her starring role in The Iron Lady) indulged at the Weinstein afterparty at the Mondrian Hotel, ordering Fatburger, which was being served at the bash. Earlier in Hollywood, the stars came out for Elton John's 20th Annual Academy Awards Viewing Party - and were captivated by Streep's shocked reaction to her win (along with Octavia Spencer's emotional victory and Christopher Plummer's charming speech). As for the host of the evening, John told PEOPLE that his party serves as a fabulous meet and greet and a chance to watch the Oscars in star company. "At the end of the day, you come away with such happy memories," he said. "I've never met Katy Perry - she's at my table tonight."