What are the best whitening strips/trays that you can buy?

I want to whiten my teeth. I already tried the Crest White Strips and they helped a little. Are there any other good ones?
--------------------
crest white strips are amazing but the twice a year strips by crest work better. They work better than the weekly or nightly ones. try them. they come in a bigger box and cost like 30 bucks but they are sooooooooo worth it :)
Source

What is the best over the counter way to temporarily whiten teeth w/o causing them pain?

Crest Whitestrips increase my sensitivity I can't deal with that.
--------------------
If your teeth are sensitive dont do it at home, do it professionally
Source

what do celebrities use to whiten there teeth so quickly?

...and also whats the best way to whiten teeth?
--------------------
the dentist. or whitestrips. =]
Source