They also seem to promote abs and that, ahem, V-shaped torso.
"Happy Halloween LOVE!RS! My team and I had fun celebrating in Dusseldorf and Oberhausen," she wrote. "How are you celebrating Halloween?"
The couple recently celebrated their one-year anniversary and showed a little social media PDA on Twitter.
"@BEAUcasperSMART BEAR!!!!!!!!!!!!!! Today is OUR's!! Thank you for sharing your beautiful smile with me everyday! #SpecialDay ♥ #LOVE!" Lopez tweeted Smart.
He replied, "Happy 1 yr. anniversary to the most Gorgeous, Kind, Sweet, Funny, Beautiful Lil Bear in the world.... Love Bear #October25"