On Thursday, the brunette beauty took to her personal blog to address the issue, saying:
[Image via Vogue Spain]
The even was hosted by King Giorgio Armani, but neither of them wore his designs!
Instead, Diane opted for a black and blue Chantilly lace dress from Jason Wu's upcoming resort collection. She completed her look with Repossi earrings, a Judith Leiber clutch and black strappy sandals.
Both ladies look absolutely stunning! We couldn't possibly decide who was best dressed.
[Image via Mavrix Online.]