OK i Recently started working with logic pro and ive been recording my vocals at 44 im wondering if i should record my vocals at a higher sample rate , my audio interface can record up to 96 , but is it worth it because if i do record at 96 i have to convert it later since it's going on a cd.

If it is best to record at 96 how do i convert later ? Oh and should i go with 16 or 24bit?

More Hz will give you better high frequencies (way out the audio range)
More bits will lower the noise floor. (yummy)

Both will eat space on the hard drive and CPU to work them.

Start with 24/44 and try if it's really better (audibly better where you are) at 24/88 or 24/96. which I doubt. You can easily in the end go down to 16/44 but mind that 48 and 96 kHz are not so easy conversions.

Myself i'd stick to 24/44

I would consider how you are mixing. If you are mixing in the analogue domain, I would suggest recording at a higher sample rate. It is true that by upping your sample rate you are only gaining frequencies outside of your hearing range, but these frequencies do affect frequencies within your hearing range, so are important.

If possible I always try to record at higher sample rates and only convert down to 44.1 at the very last stage.

Hope this helps.