An IISS Strategic Comment 'Singapore and the US: security partners, not allies':http://www.iiss.org/en/publications/...ot-allies-fe48

Although Singapore continues to balance it's national interests, as Prime Minister Lee Hsien Loong stated:
Singapore is friends with America, also with India, Japan and China and the other major powers. And we would like to maintain our good relations with all of them.
Aside: I'd missed that in June 2013 Singapore exited from Afghanistan.