User blog comment:SSTM/Who do you think has changed the most?!/@comment-3015402-20110421041247

It looks like Spencer age at all or change his appearance (only because in the two middle seasons, Jerry had his hair long :P)

Freddie's changed the most by far. Then Gibby. Noah's not a little kid anymore.

Carly got older throughout the series, and changed looks a bit, but she always looked the same. So did Sam, but now she's kinda evolved into less of a bully and more of a nicer person.