Factual error: When Bill and Ted grab Beethoven, we are shown the piano he was playing which is a Steinweg (Steinweg later changed his name to Steinway when he immigrated to the United States). Steinweg made their first piano in 1835, and the model shown was built in Braunschweig so must have been made after 1858, but Beethoven died in 1827, years before a Steinweg piano existed. Also the onscreen graphic says it's 1810. (00:47:50)

Bill & Ted's Excellent Adventure (1989)
Plot summary
Directed by: Stephen Herek
Starring: Keanu Reeves, George Carlin, Alex Winter





Answer: The song is called 'In Time' and it is performed by Robbi Robb.
Alan Sproul