So it's no wonder the cute couple decided to wear matching costumes as they celebrated Halloween on tour in Germany's Oberhausen.
Jennifer looked every inch the 60s hippie beauty with flowers in her hair, as Casper showed off his toned washboard stomach in his costume consisting of printed trousers and large Afro-style wig.
Peace & Love: Jennifer Lopez and boyfriend Casper Smart don matching hippie costumes as they celebrate Halloween in Germany
She even took to Twitter to encourage her fans to attend the concert in Halloween fashion as well.
'#Happy Halloween! We have a show tonight in Oberhausen! Let's play dress up! Can't wait to see your costumes. #DanceAgainWorldTour2012,' JLo wrote.
Flower power: Jen and Casper spread the love as they spend some time with their German fans
'Here's my costume! #HappyHalloween! My team and I had fun celebrating in Dusseldorf and Oberhausen! #peace&love!'
Jennifer and Casper still seem to be absolutely smitten with each other, and celebrated their one-year anniversary last week in style.
The usually private JLo even took to Twitter to show the world of her love for her boyfriend, who she dubbed her 'Bear' in the message.
Happy Halloween! JLo and her team celebrate the holiday during the tour
Casper then replied: '"Happy 1 yr. anniversary to the most Gorgeous, Kind, Sweet, Funny, Beautiful Lil Bear in the world.... Love Bear #October25 (sic).'
Despite three failed marriages, Jennifer, who has four-year-old twins Max and Emme with her former husband Marc Anthony, recently insisted she still believes love is the most important thing.'
Smitten: The happy couple stepped out for a romantic dinner in London last monthShe said: "You have to believe there's somebody out there who is trustworthy, who'll stick in there.
"It's difficult when a family breaks up. I'm still living through it, just trying to do my best with the kids and moving on. It was one of the most difficult decisions I've ever made.
'It's been tough but I still believe in love. That would be my message: love is the most important thing