The famous, jewelry-designing duo left their six kids home and hit MOCA's 30th anniversary gala Saturday night, where they got a personal tour of the museum.
Viewing artwork up close wasn't the only thing VIP guests were treated to...
She sang her latest song, "Speechless," while playing a pink piano and wearing Prada and a crazy chapeau designed by famed architect Frank Gehry.
Say what you will about the eccentric singer, but she's got some serious pipes!
As for Brad and Ange, they jetted off before her performance. "They had another event to go to," a source tells us.
—Additional reporting by Aly Weisman
See who else was out and about in Party Pics: Hollywood!