Kourtney Kardashian and Travis Barker showing off PDAs at the wedding reception

Kardashian - who transformed into a black lace mini dress - kissed and slowly danced with Barker at the intimate reception

After saying yes (again!) in Portofino, Italy, Courtney Kardashian and Travis Barker kicked off the party with friends and family at their wedding reception at Castello Brown.

Despite several long wedding anniversaries, the newlyweds partied until 3 am.

According to a source, Andrea Bocelli kicked off the reception with a performance of "I find My Love in Portofino," followed by "a cabaret-style show hosted by Dolce & Gabbana."

"Domenico Dolce called us last week also asked if we could make a unique surprise for his friends Courtney and Travis and the entire Kardashian family," Bocelli and Matteo told PEOPLE in a joint statement. "Portofino is in everyone's heart, and we have responded positively to this beautiful moment in his life. We wish them all the GOOD for their future together."

Drummer's son Landon then gives a speech before DJ Cassidy plays the song and gets everyone on the dance floor. In the evening, Machine Gun Kelly put on an "impromptu performance" of his hit song "Bloody Valentine," while the source added his fiancé Megan Fox clapped for him.

"Cassidy did 'All the Small Things,' and the entire Barker and Kardashian-Jenner clan danced together," the source said. "The sisters also had fun singing and dancing with the girls. They want to have fun."

Barker's daughter, Alabama, went live on Instagram at the end of the reception, giving fans a glimpse of how her dad and Kardashian are celebrating their new union.

The groom wore shirtless under a black blazer, and the couple then wore leather jackets appropriate for "Mr. Barker" and "Mrs. Barker" as they kissed and slowly danced to Bill Withers' "Lovely Day." (DJ Cassidy is seen playing songs in the trailer from Alabama.)

Shortly after seeing her sister say yes, Kylie Jenner shared several meal videos, which feature freshly made pasta and made-to-order canola.

Ahead of Sunday's celebrations, newlyweds and their loved ones take over the Italian Riviera.

After an intimate dinner at Ristorante Puny on Friday night, the larger group enjoyed a pre-wedding lunch at San Fruttuoso and dinner at the Dolce & Gabbana villa.