Brangelina, Lady Gaga Party for MOCA

L.A's downtown museum has a star-studded 30th anniversary bash.

Angelina Jolie and Brad Pitt, Pierce Brosnan, Rose McGowan and Jessica Alba put on their party shoes for MOCA NEW, the Museum of Contemporary Art's 30th anniversary gala, Saturday night in downtown Los Angeles.

Joined by Christina Ricci and Chloe Sevigny, only the elite got a private cocktail preview of a new collection celebrating the museum’s first three decades before heading in to a seated dinner and after-party. (At left, Jolie and Pitt get a very private tour; photo by Getty Images)

Once inside, Gwen Stefani caught up with Guy Ritchie (right; photo by Getty Images) as Gavin Rossdale spent time with fellow musician Pharrell Williams.

A modern art museum finally provided the long-awaited appropriate venue for Lady Gaga’s pop-art wardrobe choices. (Some sort of a dented trash can served as a headpiece while she played a pink piano dotted with blue butterflies.)

Over dinner, Lady Gaga bonded with her counterpart from the photography industry, David La Chapelle (left; photo by Getty Images). Neil Patrick Harris and Marisa Tomei (right, with boutique owner Cameron Silver; photo by Getty Images) got a sneak peek at Gaga’s one-time performance with the Bolshoi Ballet.

Before the weekend, the rare November rain hit Jermaine Dupri’s watch launch soiree for his Nu Pop Movement pieces at the exact second Lindsay Lohan stepped out of her car. The heavens above Robertson Boulevard opened up from the time the paparazzi magnet left her car until she arrived inside the Kitson Men garden party moments later.

Super-producer Dupri partnered with “jeweler to the starlets” Pascal Mouawad (left; photo by Getty Images) to launch the big and bright watches, which even un-super producers can afford at under $150.