There's nothing to hate about this!

On Friday, Julia Stiles opened up about working on 1999 rom-com 10 Things I Hate About You and working alongside Health Ledger. After receiving a fan question during her visit on Watch What Happens Live, the Hustlers star dished about her favorite day on set—which happened to be when the late Aussie actor, who passed away in 2008, performed Frankie Valli and the Four Season's "Can't Take My Eyes Off Of You."