Lauren Conrad @ Letterman

Lauren Conrad (in her own design) makes an appearance Tuesday at the Late Show With David Letterman, which is taped at the Ed Sullivan Theater in New York City.

The 22-year-old reality TV star will talk up her hit MTV show, The Hills, which returns with new episodes on Monday, March 24.

Lauren has also been in town shooting a new ad campaign for Avon’s mark cosmetics.

Tune in to watch Lauren on Letterman tonight @ 11:30PM ET/PT on CBS.

Coat by Dolce and Gabbana.