Dulce fiesta/fiesta dulce
Be aware that this translation does not have the same connotation in Spanish as it might in English. In most of the Spanish-Speaking world it does not mean "great party" as it does in English. If you mean to say it was a great party then the best translation is "gran fiesta"
So sweet. = Tan dulce.
eres dulce
ricura
dulces sueños
Ella es dulce.
muy dulce
frijoles dulces.
The big party would be "El fiesta grande" in Spanish.
In spanish, Bachelorette party translates to "despedida de soltera".
There is not exact Spanish equivalent of this. You could say"Mi amorcito" or "Mi corazoncito"
te quiero (Spanish) -> I love you (English)
hola muchacha dulce