I remember getting upgraded on my birthday, it was so last minute the ISM didn't have a record of my upgrade, which meant lots of questions when I took my seat.

She was very good about it and later organised the whole crew (not on duty) to sing 'Happy Birthday' to me at my seat..........................

Got a lovely birthday card signed by the crew with lots of kisses and hearts, drove my ex-gf crazy. One of my best birthday presents ever!