Where's Rob?!

Blac Chyna showed up at the Rihanna concert with a gaggle of gal pals sans fiance Rob Kardashian on Tuesday night. The "model" channeled Beetlejuice with her black-and-white striped pants when she headed into see RiiRi at The Forum in Inglewood, CA.

Maybe Rob is home guarding the house after her burglary over the weekend?!

In addition to highlighting that big booty, Chyna flaunted her curvy in a midriff top and patent leather burgundy jacket. That girl did not want one photog to miss her entrance!

Chyna wasn't the only celeb to rock out at Rihanna's ANTI World Tour -- Jessica Alba and Nicole Richie Snapchatted the concert as well.

Bad Gal Riri kicked off her world tour in March and starts the European leg of her tour next month.

Meanwhile, Chyna is trying to trademark her name after fearing that others will try to steal her name to sell products or make appearances, reports TMZ.

The site is reporting that the former stripper, whose real name is Angela White, is said to have lodged an application last month.

Sorry Blac Chyna -- no one wants your trashy name (which we may add the wrestler Chyna had years before you were around and she's dead now so you are fine).

Oh the self-obsession of D-list "celebs"!