PHOTO: Kardashian Sisters Hype 'Keeping Up' Premiere with New Lingerie Ad

Kim, Kourtney and Khloe strip for another Kardashian Kollection ad -- and, in the season 7 Keeping Up with the Kardashians premiere, Khloe refuses a paternity test

Once again, ladies and gentlemen, it's the half-naked Kardashian sisters! To promote the new season of Keeping Up with the Kardashians (which premiered Sunday on E!), Kim Kardashian blogged this sexy photo of herself, Khloe and Kourtney modeling Kardashian Kollection lingerie and high heels. If the picture is giving you deja vu, it may be that you're remembering this similar promotion from March, or this one from last September. You know what they say: If it ain't broke, don't fix it. (And if there's one thing the Kardashian sisters definitely are not, it's broke.)

In the new photo, Kim models a colorblock bra and panty set, Kourtney wears the zip-up "stained glass" bustier bra, and Khloe flaunts her curves in a lacy pink slip. (A "pink slip" joke about Lamar Odom might be in order here, but we'll refrain.) Now that we've seen several of these lingerie photos, here are two things we don't understand...

1. Why does Khloe always have to be covered up? Yes, she's curvy, but she's in great shape, and she looked amazing in that topless jeans ad. Maybe it's her choice, since she's admitted she's self-conscious about these photo shoots, but we'd like to see her wear the bustier in the family for a change.

2. Where is Kourtney's baby bump? Seriously, it's sort of weird that it keeps getting airbrushed out. Perhaps the shoot happened before she was expecting, but pregnant ladies need lingerie too!

On Sunday night, the Kardashian sisters put on some clothes for the season 7 premiere of their E! reality show. They didn't waste any time getting to the drama, with Kris Jenner urging daughter Khloe to take a DNA test and determine who her real father is. (Remember those rumors that Khloe wasn't Robert Kardashian's daughter, but instead the love child of a man Kris cheated with? The family has adamantly denied the reports, but that didn't stop Kris from turning it into a TV plot line.) To her credit, Khloe held her ground and refused to indulge her mother's request.

"Seriously, my dad is Robert Kardashian. My other dad is Bruce Jenner," Khloe told her mother-slash-manager. "If you f***ed other people during the same time and you do not know, go on Maury."

We give Khloe major props -- not only because that zinger might be the best thing a Kardashian has ever said, but because she has a strong enough sense of self to stand her ground against Kris. In her own words: "I am an Odom anyway. I'm not a Kardashian anymore, so let's move on." Yes, let's.

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