“This is what dreams are made of,” the 28-year-old yelled into the microphone as he and the How I Met Your Father actress danced together. Role Model's introduction to Duff was a reference to Duff's 2003 hit "What Dreams Are Made Of, famously featured in The Lizzie McGuire Movie. The film was a spin-off of Duff's popular 2001-2004 Disney Channel series Lizzie McGuire. In July, Natalie Portman played “Sally” on stage as the singer opened for Gracie Abrams at Madison Square Garden. Duff's appearance at Austin City Limits is a sneak peek of what the multi-hyphenate has in store.