Heidi Montag and Spencer Pratt brought their smiles over to the annual Austim Speaks Acts of Love Celebration in LA last night as they continue to support charities with their publicity-happy PDA. Up until now, Lauren's the only Hills star with TV guest spots, but now Heidi and Spencer are invading one of our favorite shows. The duo will star in a January episode of How I Met Your Mother, which they'll film this week. Last night, it was back to the regular Hills drama involving Spencer butting into Heidi's work, but there were the gadgets, food, beauty, and fashion to help keep us entertained.
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