My BIL is getting married later this year and wants my 8yoDD to be a flowergirl.

All the flowergirls I've seen lately have been more pre-school age.... so I'm after dress ideas for a tall, blonde 8yo. The dress can be white, pink or red (or a combination I guess). Any suggestions ladies? Or any names of online stores I can check out (just the names, as you'll be breaking BB guidelines if you post the url).

Thanks in advance She is VERY excited about being a flowergirl.