Formal:
* Beaucoup d'amour et de gros bisous: This is the most literal translation and is suitable for formal situations.
* Affectueusement: This translates to "affectionately" and is a good option for more formal letters or emails.
Informal:
* Gros bisous: This means "big kisses" and is a common way to end a message to someone you know well.
* Pleins de bisous: This translates to "lots of kisses" and is another informal option.
* Bisous: This is a simple way to say "kisses" and is suitable for close friends and family.
* Je t'embrasse: This means "I kiss you" and is a very affectionate way to end a message.
You can also add "avec amour" (with love) to any of these phrases for a more personal touch.
Ultimately, the best way to say "lots of love and kisses" in French depends on the context and your relationship with the recipient.