Millionaires on their tour bus in Tucson, AZ on May 11, 2013 – instagram

Allison Green wore a Juicy J We Trippy Mane T-Shirt ($20.00) at a show on the Tonight tour. You can buy this design in many colors and graphics on Spreadshirt.

photo posted by Carah Faye Charnow on instagram

Carah Faye Charnow’s exact t-shirt is the “True Romance” tee from Toby Morse’s now-defunct Straight Edge O.G. clothing line. You can get a tee with the same graphic from eBay ($16.34).

Ariana Grande at the 102.7 KIIS FM Wango Tango May 11th, 2013 – photo: PR Photos

Ariana posed before her performance at the 102.7 KIIS FM Wango Tango yesterday wearing a Naven Mod Top ($187.00) and Bell Mini ($244.00). You can get the look for less with an American Apparel Cotton Spandex Sleeveless Turtleneck Crop Top ($30.00) and Chiffon Double-Layered Shirred Waist Skirt ($42.00) in Bubble Gum.

Demi Lovato performing at Channel 93.3’s Summer Kick Off Concert May 10th, 2013- photo: tumblr

Demi performed at Channel 93.3’s Summer Kick Off Concert the other night wearing a Lanvin Two-Tone Silk Chiffon Shirt (£745.00), a pair of Topshop Disco Treggings ($40.00) and her favourite Jeffrey Campbell 8th Street Leather Boots ($159.95). You can get the look by wearing a white tank top underneath a Contrast Collar Chiffon Button-Up ($58.00) from American Apparel.

Rihanna at the Diamonds World Tour Afterparty in NYC May 7th, 2013 – photo: rihannalounge.com

Rihanna partied at the Diamonds World Tour afterparty in New York City the other night wearing a Grey Rihanna Knot Front Cropped Cami Top ($45.00) from her collection for River Island.

Selena Gomez leaving her hotel in Miami May 11th, 2013 – photo: AKM-GSI

Selena Gomez greeted fans today while leaving her hotel in Miami wearing a Smiley Silk Vest ($128.00) from All Saints.

“#MixersMagnetsUK are you ready??” – Little Mix on twitter

Leigh Anne performed with her bandmates yesterday wearing a Kuccia 80s Spot Print Bomber Jacket (£56.00).

photo posted by Ariana Grande on Instagram

Ariana Grande posted a picture wearing the I Love Valley Girl Fox Tank by Wildfox Couture ($48.00) on the soundcheck for Wango Tango.

“#MixersMagnetsUK are you ready??” – Little Mix on twitter

Jade Thirlwall poses with the Little Mix backstage their Mixers Magnets UK event. She wore a Galia Tartan Studded Shirt from Missguided ($51.28), the Tulisa TFB Leather Look Skater Skirt (£19.00), Topshop Over the Knee Socks (Sold Out) and a pair of Dira Tartan Point Plataform Boots by Boohoo ($70.00)

Melanie Martinez backstage at First Avenue in Minneapolis, MN on May 10, 2013 – instagram

Melanie Martinez wore The LA Boutique Never Say Goodbye Dress in Green ($28.95) from Miss KL at her concert in Minnesota last night.