Her past is unknown, but she winded up working in marketing with Dave Seville
Alvin and the Chipmunks
Dave arrived late for a meeting due to (although she did not know this), driving the Chipmunks home. Dave tries to participate in the meeting, but the Chipmunks continue to cause trouble, first by calling Dave about issues at home, and also by drawing on his presentation. Gail ultimately fired him as a result. It is likely Amy understood the situation after the Chipmunks' rise to fame.