Miley Cyrus Treats Mom to Post-Holiday Girls' Day Out

How do you top off a Thanksgiving dinner? If you're birthday girl Miley Cyrus, you treat your mom to a girls' day out.

After celebrating the holiday at their Toluca Lake, Calif., home, Cyrus, who turned 18 Nov. 23, and her mom Tish braved the holiday shoppers Friday to get their nails done and share a casual ladies' lunch.

At Cosmo Nails in Toluca Lake, "Miley and her mom enjoyed pedicures and seemed very happy to spend some alone time," an onlooker tells PEOPLE. "They kept chatting and were both in a great mood. Miley treated her mom and she was very sweet and also left a great tip."Later, during lunch at Panera Bread, "Tish and Miley kept hugging at the table. They were talking a lot and both seemed very happy," an observer says. "A few fans approached Miley and she was very nice to them."

Miley's dad, Billy Ray Cyrus, spent the holiday in Nashville after recently filing to divorce Tish.