The Marydean special:
Ball up some wildberry or tropical sorbet using a melon baller than refreeze on a tray (do a whole tray because they're nice).
Add a ball or two to a champagne glass and fill with your choice of soda water, lemonade, fizzy apple, or non-alcoholic sparkles (eg Maggie Beer Sparkling Ruby Cabernet). Everyone else will want one too so they can have it with regular champagne or a spritzer over the top. Cheers!