10 mins AMK > BSH. 
It's possible the bus is this route.
Sentosa Gateway > Telok Blangah Rd > Kg Bahru Rd > Jln
Bt Merah > CTE > Ang Mo Kio Ave 5 > Ang Mo Kio Ave 6 >
Bishan Rd > Braddell Rd > CTE > Jln Bt Merah > Kg Bahru
Rd > Telok Blangah Rd > Sentosa Gateway