They may be 40... but their hits... timeless.

1990's favorite wonder-twins are 40. Matthew and Gunner may be twin brothers, they may be twin sisters, but either way - you should get a Nelson tattoo on your bicep to celebrate their 40th birthday.

And if you're thinking about getting them a birthday gift - and I know you are since they singlehandedly saved the power-ballad-pop-rock genre of music - I hear CVS has a deal on Suave for 79 cents a bottle.