Katy Perry The Post-Split Blues

1/13/2012 5:55 AM PST

Katy Perry -- The Divorce Blues

Rocking some interesting blue hair, Katy Perry was spotted out in public on Thursday for the first time since splitting with estranged husband Russell Brand two weeks ago.

The 27-year-old "California Gurl" was all smiles as she posed with a fan while on the set of an Adidas commercial she is filming in Santa Barbara.

As TMZ previously reported, Katy will continue living in the former couple's $6.5 million Hollywood Hills home and Russell will move out.

While Russell filed for divorce after only 14 months of marriage, he and Katy are said to still be on reasonably good terms.