Ally and Jaime prepare to go to their senior prom.
Ally and Jaime graduate from high school and have a big party.
Ally and Jaime go to a premiere of a movie that Ally produced and then they go to Nantucket to clebrate the Fourth of July.
The girls give their opinions on the new Tommy Hilfiger line and then go on a shopping spree at FAO Schwartz. Then the girls goes to the Hamptons with their friends, Kether and Tell.
The Gleicher's dog, Midge, becomes really sick and Ally finds out that Jaime's brother, Michael has a huge crush on her.
Ally is home alone, confused and lonely, and she goes into a weird mental state. To cheer her up, Jaime decides that her and Ally will visit her aunt in Seattle.
The girls visit L.A. and unexpectedly find romance there.
Ally, Jaime, and their friend Liz visit London, but Jaime feels ""secluded"" when Ally gives her a separate room from Liz and Ally.
Jaime prepares for college, while Ally is looking for an apartment. Also, a big blackout occurs in NYC, which freaks Jaime out.
Jaime starts college at Barnard and loves it. Ally helps her father with the new juniors line. Michael the ""Putz"" comes to visit Jaime but he talks too much about his girlfriend Julia and Jaime tells him she's moved on. Ally and Jaime see each other again and feel that some time apart has made their friendship stronger.