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Kourtney and Khloe glammed it up to party with their famous family at The Sunset Towers Hotel in West Hollywood.

With adorable Mason in her arms, Kourt was there to celebrate Redbook's first ever family issue. With a stable family like the Kardashians, we can't think of a family that's better suited to take part in the festivities.

As for Khloe, she and hubby Lamar went from The Sunset Towers to a taping of The Ellen DeGeneres Show. Find out what they talked about ... after the jump.