The Los Angeles County Sheriff's Department arrested Miranda Tozier-Robbins after security guards stopped her at Spears' suburban Calabasas home. Deputies say the 26-year-old was issued a citation for trespassing and disorderly conduct and released.

The incident happened hours before Spears was scheduled to perform the first of two shows this week in Los Angeles. The 27-year-old singer's whereabouts at the time of the incident are unknown. The sheriff's department said it did not know, and an e-mail sent to Spears' publicist was not immediately returned.

Sheriff's spokesman Steve Whitmore said it was unclear what the woman was up to. Jail records did not indicate whether Tozier-Robbins has an attorney.

Spears recently moved from her hilltop home in Los Angeles. Her former home was prone to spying by the paparazzi, who occasionally staked out a fire access road to try to get shots of the 27-year-old.