The 25-year-old Malibu singer channeled old Hollywood glamour, while her Aussie beau opted for a traditional tuxedo.
Elton John's iconic viewing party has been tradition since 1993, and it's become one of the most high-profile Oscar parties in Hollywood. The party has raised more than $200 million for HIV/AIDS prevention over its twenty-five years.
To see all the amazing looks from the 90th Academy Awards, see here.
