Christina Aguilera Kisses Her Knight In Shining Armor

We're not exactly sure what Christina Aguilera was dressed as on Saturday night, but we're glad she's still madly in love with beau Matthew Rutler!

The pop star and her steady boyfriend were spotted on their way out the door to a Halloween bash, and the duo looked like they might have been doing a little pre-partying at her Beverly Hills mansion beforehand. Hey, as long as her son Max was with a nanny or daddy Jordan Bratman, nothing wrong with that! But hopefully she doesn't try to steal his thunder with another sexy costume when they go trick or treating on Wednesday night!