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Julia Louis-Dreyfus is celebrating her last day of chemotherapy. The Veep [2] actress, who announced her breast cancer diagnosis [3] back in September, shared a video of her two sons singing Michael Jackson's 1982 hit "Beat It" in honor of her special day. "My beauty boys [Henry and Charlie] made this for me today, my last day of chemotherapy," she wrote. "Pretty swell, right? Ain't they sweet?" The 56-year-old has remained in high spirits since her diagnosis. Over the holidays, Julia shared a photo of a transfusion bag [4] and called it her "Xmas cocktail," proving she wasn't letting her chemotherapy treatment get her down. Watch her sons sweet video message to their beloved mom above.