Si dices una frase como ésta se sobreentiende que no estás en un contexto formal. Yo simplemente diría: Gente, ¡os quiero a todos!. On the other hand, you know there are differences between spanish from Spain and southamerican spanish, so it all depends on which kind of spanish you want to use. In spain, we will definitely say what I have just written unless you want to use it in a formal context. Hope it helps.