Kris Jenner's Bikini Body Secret: I Exercise 'As Much As Possible' -- Including 4:30 A.M. Workouts!

After Kris Jenner had jaws dropping and tongues wagging with a bikini shot earlier this month, the Momager credited her sexy figure at 58 to "a really good angle" and plain old hard work.

"I try to work out as much as possible and eat right ... I get up about 4:30 AM and workout," the image-conscious mother-of-five told the U.K.'s Heat. "I'm a foodie so I love to eat, so it's a problem."

The comely cougar, who's been romantically linked to young stud Ben Flajnik following her separation from Bruce Jenner, added that the swimwear pic "was shot from up above," making for a "really good angle" that complemented her physique.

Elsewhere in the chat, the reality TV maven gushed over her granddaughter North (who she first unveiled on her doomed daytime talk show).

"She's really beautiful and she smiles a lot: she's a great baby," Kris said. "Thank goodness. If we had a crier on our hands, I'd be out of there!"

Asked if the new season of Keeping Up With The Kardashians would feature the infant, Kris said she's "not sure exactly,"as filming and production are still ongoing.

While she's clearly over the moon about her granddaughter, the mover-and-shaker was more coy when asked about the fairest of her five daughters: Kourtney, Kim, or Khloe Kardashian, or Kendall or Kylie Jenner.

"I have a different favorite kid on any given day," she said. "Somebody asked me once, 'Who's your favorite child today?' and I said Kim -- that was taken out of context."