these have become one of my latest obsessions!  They are soooo good!  And only 90 calories...plus SUPER easy.  All you have to do is get funfetti cupcake mix...specifically the cupcake mix.  My sister made that mistake and it is not the same :)  All you do is mix it with a 12 oz can of Diet Cherry 7 up.  Nothing else.  Then follow the baking directions on the box.  Viola!  They are so moist and yummy!  I can eat these without frosting...but if you do add frosting they of course are no longer 90 calories, but in actuality a 150 calorie cupcake is still totally worth it to me!