The crowds, protected from the downpours by a sea of umbrellas, came out to voice their displeasure at the ruling People's Action Party's (PAP) immigration policies, rally organisers said.
Rik Waller came under the spotlight during the competition for having a sensational voice but critics said that his large size precluded him from becoming a fully-fledged Pop Idol.
The sole voice in favor of a cease-fire came from Mahmoud al-Mehdon(ph), a Palestinian from east Jerusalem who was looking at school bags with his wife.