20 Jan: ONE OK ROCK Ambitious Asia Tour 2018 in Singapore
31 Mar: amazarashi x Aimer Asia Tour 2018 In Singapore
2 June: Mayday 2018 LIFE Tour in Singapore
21 July: LiSA LiVE is Smile Always ~ASiA TOUR 2018~ [eN] in Singapore
13 Aug: RADWIMPS Asia Tour 2018 in Singapore
15 Sept: Sekai no Owari in F1 Grand Prix Singapore
1 Dec: C3 Anime Festival Asia 2018

A few more that I gave it a pass:

17 Mar: HY
1 Apr: Miyavi
4 Dec: Judas Priest with BABYMETAL as guest

All my favourite artists/groups/bands (except for Mayday) aren't coming back. Considering that I did not go overseas this year, it's quite a decent one in Singapore as compared to 2017's. Same wish for every year, wishing there will be more for the following year!