The friendship between Chelsea Owens and Allison Foster began in the first book of the Double Trouble: The Final Year called, Senior Year.
|Chelsea & Allison|
|Friendship Started||Senior Year|
Chelsea Owens transferred to Santa Mira High School along with fellow students Ethan Ford and Dean Cameron
- Chelsea and Allison's mothers are friends.
- Chelsea is also friends with Allison's twin sister, Kate.
- They both sit with Kate at Lunch and Nutrition.
- They both graduated in the final episode of the Double Trouble: The Final Year series.