Informal:
* Moi aussi! - This is the most common and casual way to say it. It literally means "Me too!"
* J'adore ça aussi! - This means "I love that too!" and is slightly more emphatic than "Moi aussi!".
* Je l'aime beaucoup aussi! - This translates to "I like it a lot too!" and is a bit more formal than the other options.
Formal:
* Je l'aime beaucoup également. - This means "I like it a lot also" and is appropriate for more formal situations.
Other options:
* Je suis d'accord! - This means "I agree!" and can be used in situations where you're expressing your agreement with someone else's love for something.
The best way to choose which phrase to use depends on your relationship with the person you are speaking to and the context of the conversation.