Jenna Dewan only signed up for 'World of Dance' to hang out with Jennifer Lopez

She said of Jennifer: "I've looked up to her my whole life.

"I need her secret. I'm telling you, half the reason I did this show was to find out Jennifer's secrets and I have not done it yet.

"I think it's just natural, which is the most annoying part of it all. She just like kills it. She can still own a stage. Ugh, she's everything!"

And the 37-year-old actress - who recently split from her husband Channing Tatum, the father of her four-year-old daughter Everly - is convinced it won't be long before Jennifer gets engaged to boyfriend Alex Rodriguez.

She told 'Entertainment Tonight': "I mean, I'm sure that's happening."

And the show's other judges, Ne-Yo and Derek Hough, also think it won't be long before the retired baseball star pops the question.

Ne-Yo, 38, said: "If you've ever seen the two of them together, it's pretty much the next step. They're, like, annoyingly cute. Like, stop touching each other."

If the couple do get engaged, dancer Derek, 32, is keen to be involved with their celebrations.

He quipped: "I'd be like, 'Cool man, where's the party? Let's go' "

Jennifer - who has previously been wed to Ojani Noa, Cris Judd and Marc Anthony - recently admitted she is "open" to getting married again.

Asked if she wants to marry again, the 'El Anillo' singer - who has twins Max and Emme, 10, with Marc - said: "I am open to all of the greatest possibilities in life, whatever those may be."