Heidi Montag headed out to pick up her Halloween costume in LA yesterday at the famous Trashy Lingerie. Never one to keep it low-key, Heidi snatched up a predictable sexy Catholic Schoolgirl outfit that doesn't leave much to the imagination. Last year she and Spencer didn't couple up with their costumes, but seeing him dressed as a priest seems right up his alley. No matter what, I'm sure they'll give us a peek tomorrow night when they hit the town — I just wonder if they'll run into anyone dressed up as obnoxious Heidi and Spencer while they're partying away.