I can suggest two ways for you. If your concert ends around
2400, u can try taking bus 920 to Jelebu Rd, However, the last bus
timing of 963 and 960 from Harbourfront and Marina Ctr are both
2330.
So I suggest u can take 187 at Bukit Panjang Rd to Woodlands. The
last bus timing of 187 from Boon Lay is 2400.. The feeder services
at Woodlands will end around 0050. So the timings are very
important for this option.
The next option will be to take bus 920 or walk to the main rd
Bukit Panjang Rd where u take 190 towards city, take NR3 to Scotts
Rd and cross the road to transfer to NR2 to your home.