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What a good friend! Supporting best friend Leah Remini, Jennifer Lopez took her main man Casper Smart and twins Max and Emme to the first day of Dancing with the Stars rehearsals on Thursday. We wonder if the sultry star and her back-up dancer beau gave Remini some hot dance-floor tips!

The former King of Queens actress and Jenny from the Block have been besties for over seven years. Lopez has reportedly been very supportive during Remini's much publicized break from the Church of Scientology. After Remini's defection from Scientology in July, her sister Nicole told People magazine about the star-studded friendship, saying, "They're best friends and they're fine. None of her Scientology friends are sticking by her side. I guess you really learn who your friends are."

Photographed both coming and going to the Los Angeles rehearsal, the 26-year-old was spotted carrying JLo's most precious cargo. What a man, what a man, what a mighty good man! The 44-year-old's much younger boyfriend is certainly seeming at ease with her five-year-olds.

The couple spent hours with the singer's kids and towards the end of the day JLo carried a sleepy Emme, while Smart held Max. Unfortunately it looks like little Max still has a cast on his arm. We hope he heals fast!

For the kid-tastic day, the diva donned a cheeky t-shirt with mustached Marilyn Monroe, ripped cut offs and chic Giuseppe Zanotti Croc-Embossed Zip Wedge Sneakers. Smart dressed down in a t-shirt, baggy jeans, baseball cap and some Air Jordan kicks.

The American Idol judge recently opened up to Cosmopolitan about her much younger love, “For me, it’s about having a great partner to walk this life with. I have my own high standards for what I want in a partner and how I want to be treated.”

She also added about her nearly two-year relationship with the dancer, “I bring a lot to the table. I’m not talking about material things but what I have to offer as a person – love and loyalty and all the things that make a good relationship."

Looks like all is well in JLo land!