Honorable mention: Charlize Theron, playing her part.
25: Phil, a man we've never seen before, buys the band's record. Later he intros himself to Guy and convinces them to sign with him and he begins to get them gigs in other towns. The birth of something new.
45: Tom Hanks aka Mr. White advises the band before they go on stage. He gives them sunglasses and they do well on stage, impressing people. A montage shows their song moving up the charts as they cross the country on a nationwide tour. Now that I'm aware.
60 and -45: In Wisconsin, Mr. White informs the band they are going to Hollywood. The band walks into their first screaming group of fans as they run into the limo. They almost lose Faye who starts to cough. Guy makes sure Faye is resting on the plane. When Guy mentions Faye is ill Jimmy ignores him. Discovery and There's no going back now.
-25: Ethan Embry is on a ride with the Marines and Mickey at Disneyland. Mr. White tells the band they need to replace Ethan and intros the new bass player. Guy asks Mr. White about Faye and he replies she's fine. Faye dresses up and is escorted into the theater where the band will play live on TV. Guy's parents are excited about their son's popularity. Eventually the band will split up with each going their own way, at -25 the first departure happens. The final turning point.