I think the Tickled Pink set is adorable-you could do the flamingo with the lei and add glitter to the flowers. The bg paper could be white cs and you could type in the phrase "_________'s Shower is going to Tickle Her Pink!" for the front and then lightly sponge the page in pink. Have the flamingo stamped on another piece matted on hot pink paper and it would be adorable (I think)
On the inside you could wheel the flamingos in pink and then do a vellum overlay with the invitation details.
I know in the gallery is a little cello bag with a pink lemonade recipe you could even use as favors for the shower.
Paint Prints (SAB set) would absolutely work stamped in bright colors (pink passion and yoyo yellow with glorus green leaves)
I think a bolder set than Fresh Flowers has more punch to it is nicer to get, but that is just me