The Ventura County Sheriff's Office confirmed to Variety that Spears' first husband was an unwanted visitor to the Toxic singer's home on Thursday.
According to Sergeant Cyrus Zadeh, the Sheriff's Office was dispatched to the pop star's residence answering a trespassing complaint.
After checking their records, Alexander was found to have an out of county warrant against him and was arrested for that offence. Deputies are reportedly still determining whether to press trespassing charges.
A video obtained by TMZ shows Alexander went live on Instagram before the event.
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