all you need is love!

1

你所需要的是爱。
ni3 suo3 xu1 yao4 de shi4 ai4.

你只需要爱。
ni3 zhi3 xu1 yao4 ai4.

First one was more literal in translation, second sounded more like what a native would say. Both are grammatically correct.

0

tudo que você precisa é amor!

0

in fact there is slight difference between
你所需要的是爱 and 你只需要爱
the first one means what you want is love, while the second means the only thing you want is love.