Lauren Sanchez and her billionaire fiancé Jeff Bezos celebrated her 55th birthday at an Usher concert at the Kaseya Center in Miami, Florida.

Friends of the celebration, including Katy Perry and Orlando Bloom, then continued the party with a fancy dinner at Miami’s newest hotspot, we hear.

In a video from the concert, Usher can be seen walking up to greet the famous couple – and the pop singer gave the Amazon mogul a high-five.

In August, Bezos, Sánchez, Perry, Bloom and Usher were spotted vacationing together in Dubrovnik, Croatia.

Bezos and Sánchez also had dinner with Usher and his wife Jennifer Goicoechea in November.

The birthday girl also posted a picture from the night with friends including Baby2Baby’s Kelly Sawyer, Lydia Kives, Bego Amaya, Veronica Smiley Grazer, Elsa Collins and Elena Blair.

Later, Bezos, Sánchez, Bloom and Perry headed to Sparrow Italia, where they were spotted in the restaurant’s exclusive VIP “upper deck” for a private celebration.

We hear that other friends have joined them, including “Havana,” singer Camila Cabello and music mogul Scooter Braun.

Sánchez received birthday messages online from celebrity friends including Kris Jenner, Kim Kardashian, fashion designer Stacey Bendet and Eva Longoria.