More than 2000 pictures of female barefoot musicians on stage.

https://www.flickr.com/photos/104067269@N08/

Nearly 400 different female musicians or bands:

Aino Jawo
Alex Santana
Alicia Keys
Alina Süggeler
Alinne Rosa
Alizée
Amanda Blank
Amanda Jenssen
Amanda Sudano
Amber Rubarth
Amel Bent
Amy Lee
Amy Whinehouse
An Pierlé
Andrea Berg
Andrea Corr
Anna Maria Jopek
Anna Maria Zimmermann
Anna Nalick
Anna Oxa
Anna Weatherup
Anneke van Giersbergen
Annie Quick
Arisa
Ashlee Simpson
Ashlyne Huff
Aurea
Aurelie Cabrel
Avril Lavigne
Badi Assad
Barefoot Breakdown
Barefoot Fiddler
Barral House Mama
Baskery
Bat for Lashes
Belinda Carlisle
Bell, Book and Candle (Jana Groß)
Beth Hart
Beth Wood
Björk
Bleech
Bosnien Rainbow
Brandi Carlile
Britney Spears
Cactus in Love
Carina Round
Carla Werner
Caro Emerald
Carly Connor
Carolin No
Carrie Underwood
Cascada
Casey Desmond
Cat Power
Cate Ferris
Catenia Quentin
Celeste Buckingham
Celine Rudolph
Chantel McGregor
Charlotte Church
Charlotte Hatherley
Charlotte Yanni
Chloe Chaidez
Christina Aguilera
Christina Stürmer
Christine Ybañez
Cindy Wilson
City Circus
Coco and the Butterfields
Colbie Caillat
Conway
Coshiva
Courtney Love
Cyndi Lauper
Dan Greenwood
Daniela Bove and The Belongings
Deana Carter
Deap Vally (Lindsey Troy)
Deborah Gibson
Delta Goodrem
Demi Lovato
Detroit 7
Devil Doll
Dia Frampton
Diana Del Bufalo
Diana Vickers
Dirty Lucy
Dixie Chicks
Dobacaracol
Dolores O'Riordan
Duchess Says
Dulce Pontes
Edyta Górniak
Eiszeitclub
Eivør Pálsdóttir
Elefant Revival
Elena James
Ellen ten damme
Ellie Goulding
Els Pynoo
Emilie Simon
Emily Haines
Emily Kokal
Emily Loizeau
Emily Osment
Emma Bunton
Emma King
Emmelie de Forest
Erin Smith
Euzen
Ewa Farna
Faith Hill
Florence and the Machine
Florence Welch
Francisca Valenzuela
Gabriela Guncíková
Gabriella Cilmi
Gavin Turek
Genevieve Chadwick
Gianna Chillà
Gilli Moon
Glass Candy
Grace Potter
Gracia Baur
Gwen Hughes
Hailey Duff
Hannah Epperson
Hardwater
Heather Nova
Helene Fischer
Her Rose (Cora Perry)
Hillary Duff
Hillary Scott
Holly Golightly
Holly Pulliam
Hotchacha
Hot Puppies
Hussy Hicks
Icona Pop
Idina Menzel
Isabelle Geffroy
Iva Frühlingová
Ivette Nadal
Jade Castrinos
Jade Thirwall
Jana Kramer
Janna Goodwille
Jasmin Wagner
JazzAscona
Jeanette Biedermann
Jeanne Cherhal
Jennifer Noble
Jessica Cornish
Jessica Simpson
Jessie Baylin
Jhene Aiko
Jitka Válková
Jojo
Joss Stone
Julia Kent
Julia Nunes
Julianne Hough
Juliet Simms
Juliette Lewis
Kaki King
Karimouche
Kate bush
Katherine McPhee
Katie Melua
Katie Waissel
Katy Perry
Kayah
Kellie Pickler
Kelly Clarkson
Killola
Kim Sanders
Kim Sanders
Kina Grannis
Kira and the kindred spirits
Kisha
Kitten
Kitto
Kizzy Crawford
Krezip (Jacqueline Govaert)
Kristin Asbjørnsen
Kristina Dörfer
Krystal Meyers
Kyla La Grange
Lacey Mosley
Lady GaGa
Laleh Pourkarim
Lana del Ray
Lauren Harris
Le Wrens
LeeAnn Rimes
Lemolo
Lena
Lena Katina
Leona Machálková
Les Ardentes
Lily Allen
Linda Bengtzing
Lindsey Stirling
Lisa Lobsinger
Lissie
Little Dragon
Lola
Loreen
Lorna
Lotus
Lou Rhodes
Luiza Possi
Lydia Warren
Magda Steczkowska
Magdi Ruzsa
Máiréad Nesbitt
Malika Sellami
Malu
Mandy Grace Capristo
Mandy Moore
Maras April
Maria Mena
Mariana Aydar
Mariana Vega
Marianne Aya Omac
Marie Cherrier
Marie Fredriksson
Marike Jager
Marina Celeste
Marina Lambrini Diamandis
Mariya Ignatova
Marjolein Fredrix
Marnie Stern
Maryla Rodowicz
Meg and Dia
Megan and Liz
Melanie C
Melanie Pain
Meytal Cohen
Mia Doi Todd
Michelle
Michelle Branch
Mila Mar
Miley Cyrus
Mimsies
Mirah
Miranda Lambert
Miranda Stone
Missy Higgins
Molly Venter
Mona Tavakoli
Monika Bagárová
Monika Brodka
Monika Urlik
Mostly Autumn
Nans Huizinga
Natalia Przybysz
Natalie Imbruglia
Natasha Khan
Nelly Futado
Nerina Pallot
Nico Vega (Aja Volkman)
Nicole
Nicole Darcy
Nicole Keipert
Nicole Scherzinger
Nika Danilova
Nikki Kerkhof
Nina Zilli
Nitocris (Kira)
Norah Jones
Nouvelle Vague
Olga Lounova
Olivia Millerschin
Otter Pops
Palmy
Partyband Surprise (Vanessa Chase)
Patricia Barber
Patrizia Laquidara
Paty Cantú
Paula Fernandes
Paz Lenchantin
Penny and the Mystics
Phoenix Trap
Pink
Pint and we fall
Pixie Lott
PJ Harvey
Po Lecomte
Polina Gagarina
Radiostar
Raquel del Rosario
Rasputina
Ratjke
Rebekah Delgado
Rebekka Bakken
Rita Ora
Robin Maede
Roma Waterman
Roxana Carabajal
Ruth Theodore
Rya
Sabrina S.
Sade
Samantha Fish Band
Samaris
Sammie Jay
Sandie Shaw
Sara Dee
Sara Ott
Sarah Bettens
Sarah Blackwood
Sarah Connor
Sarah Kelly
Sarah Slean
Sataney Kazanova
Savage Rose
Saving Jane (Marti Dodson)
Selena Gomez
Shakira
Shania Twain
Sharyhan Osman
Sheryl Crow
Shock Twins
Something for Kate
Sophie B. Hawkins
Sophie Woods
Souljah Fyah
St. Vincent
Stacy Orrico
Stephanie D.
Stephanie Heinzmann
Stevenson Ranch Davidians
Stonefield
Susan Robkin
Susanna Hoffs
Sys Bjerre
Taimane Gardner
Tallulah Renalall
Tamera Foster
Taming Ingrid
Tanya Tagaq
Tarja Turunen
TATU
Tay Jardine
Tayla Linn
Taylor Swift
Terri Nunn
The Butcherettes
The Chasers (Angela)
The Corrs
The Ditty Bops
The Drones
The Entrance Band
The Idol Dead
The Noisettes
The Unnaturals
The Zutons
Theresa Andersson
Think Tank
Tina Arna
Tina Karol
Toby Beard Band
Tove Lo
Tox-x
Trash Kit
Tristan Prettyman
Tuo
V.V. Brown
Valeria Carvalho
Vanilla Ninja
Vered Didi Benami
Veronica Maggio
Vicci Martinez
Vive la Fete
Warpaint
Whatever
Who shot Holga
Wonderwall
Yasmine Hamdan
Young & Desperate
Yuliya Savicheva
Zazie
Zola Jesus
Zukuna Sisters

A couple extras:
Linda Ronstadt (in her early days)
Janis Joplin (at Woodstock!)

Wow, that's an impressive list!

I've noticed an increase in barefoot performers over the past couple of years as well as actresses going barefoot recently too. Really hoping that their celebrity status helps to influence others to go barefoot in public more often.

YES!! I second that!!