I heard some noises outside my room at about 10 minutes prior to midnight, so I had a hint, and true enough, at midnight they came in and surprised me with a chocolate cake, with '23' written on it with skittles (yes!) and peanuts and M&Ms.
Thanks again, to my wonderful housemates, Bala, Kerol and Franky. It doesn't feel too good to be the eldest in the house though!