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She may be putting on a strong facade, but all the pregnancy rumors have upset Disney darling Brenda Song.

The Social Network star looked somber as she chatted on the phone while running errands in Los Angeles Thursday. No baby bump could be spotted through the lacey black tank and skirt combo Brenda wore, and that's with good reason -- her mother, Mai Song, says her daughter is not expecting a child with her boyfriend, Miley Cyrus' brother Trace Cyrus.

Brenda's mom, who previously battled breast cancer but is back in treatment, told Star magazine:

    “She’s actually not pregnant. It’s very upsetting to our family because of what I’m going through and it’s not how we raised her."

Pregnant or not, the one thing that's clear is that Brenda, 23, is tight with the Cyrus clan -- and heavily influenced by them. A few months ago, Miley was spotted with a new anchor tattoo on her wrist. Now Brenda has stepped out with a similar tattoo on her pinky.

It should be no surprise as Trace is covered in ink from head-to-toe.