It's officially holiday party season!

On Saturday, Dec. 6, Hollywood turned out to producer Jennifer Klein's Los Angeles-area home for her annual bash, dancing late into the evening and toasting with Piper-Heidsieck champagne.

Couples who turned the fête into a date night included Katie Lowes and husband Adam Shapiro , Richard Marx and wife Daisy Fuentes , Niecy Nash-Betts and wife Jessica Betts , and Topher Grace and Ashley Hinshaw , who were spotted waiting patiently in line to pick out a Parfum de Marly scent , according to an onlooker.

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