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Pippa promotes her book in four different dresses

Who said outfit changes are just for pop stars? Not Pippa Middleton. While promoting her new party-planning guide "Celebrate" in London Thursday, the Duchess's little sister, 29, showed off four fab looks. She did admit in the book that her family — and her bottom — helped make her famous, so why not show if off? She mingled with kids and posed for photo-ops, all the while enjoying her turn i
For an afternoon children's party at Daunt Books on London's Fulham Road, Pippa arrived wearing this Roksanda Ilincic dress in trendy plum.
For an afternoon children's party at Daunt Books on London's Fulham Road, Pippa arrived wearing this Roksanda Ilincic dress in trendy plum.David Levenson / Getty Images Contributor
Pippa Middleton launched her new book in London Thursday with several super-cute dresses.David Levenson / Getty Images Contributor

Who said outfit changes are just for pop stars? Not Pippa Middleton. While promoting her new party-planning guide "Celebrate" in London Thursday, the Duchess's little sister, 29, showed off four fab looks. She did admit in the book that her family — and her bottom — helped make her famous, so why not show if off? 

She mingled with kids and posed for photo-ops, all the while enjoying her turn in the spotlight.     

Pippa kicked off her multi-outfit day with this one, by Paper London, at Foyles bookstore, who shared this pic on Twitter.@Foyles
For an afternoon children's party at Daunt Books on London's Fulham Road, Pippa arrived wearing this Roksanda Ilincic dress in trendy plum.David Levenson / Getty Images Contributor
Once inside Daunt Books, Pippa changed into this sparkly number by Markus Lupfer for teatime.David Levenson / Getty Images Contributor
For her final outfit at Daunt Books, Pippa wore this two-tone Stella McCartney design.Danny Martindale / Getty Images

Watch for more about Pippa's big night:

Read more: Sorry, ladies! Europe's last single royal heir marries 

Video: Party tips from Pippa Middleton 

Slideshow: Duchess Kate's royal style