its acceptable, dont worry. i hear lots of other straight dudes singing along when a timberlake song is playing. lots of people think his beats are catchy.
Fuck that... I went to J Timberlakes concert like 4 years back... his shit rocks... and there are mega pussy (Right in my age range too) at the concerts..
And they can't all have justin... I am the next best fucking thing there... if not better...