Jennifer Lopez and Reba McEntireGetty Images

Muhammad Ali’s annual Celebrity Fight Night attracted plenty of stars to the J.W. Marriott Desert Ridge Resort & Spa in Phoenix to raise funds and awareness for Parkinson’s disease research—the weekend raised $7.2 million!—including Jennifer Lopez (in Maria Lucia Hohan) and Reba McEntire (in Cluny). Before taking the stage to perform five songs, Lopez accepted the gala’s Humanitarian Award on behalf of the Lopez Family Foundation, a charity she founded with her sister to increase the quality of healthcare for women and children around the world. “This award is a wonderful acknowledgment of the work we’ve delivered and that we want to deliver,” Lopez said while accepting the award. “Ever since I was young, [Muhammad] Ali has always been this massive presence; he is a larger-than-life person who inspired the world and showed us that anyone can achieve their dreams.” Click through the gallery to see more of the weekend’s star-filled parties!

— Lindzi Scharf