Should Kylie Jenner start watching her back? Is her big sister Kim Kardashian trying to overtake her line of Lip Kits? Is Kardashian’s new “Hot Lips” everyone’s new favorite lipstick?

According to Cosmopolitan, the reality star is launching her very own lipstick line. But this is not a lip shade of her own creation. Kardashian is merely collaborating with the iconic make-up artist, Charlotte Tilbury.

“Kim is a modern day icon…[She is] the queen of the nude lip. This vintage inspired pale pink nude makes lips look instantly fuller and irresistible,” Tilbury told Cosmopolitan. Her new lip colour, Tilbury said, would help Kardashian evoke “the 1960’s tartlets like Raquel Welch and Sophie Loren.”

However, Kardashian is not really trying to trump her little sister’s Lip Kit success. According to Hollywood Reporter, the social media star is doing this partly for charity. They plan to donate £1 (1.87AUD) to Women for Women International for every Hot Lips sold in the first two months of its launch. The charity reportedly “assists women in countries affected by war and conflict.”

Kardashian’s Hot Lips Kim KW will be sold at £23 (about 43AUD). Kardashian is not the only celebrity Tilbury is working with for her “Hot Lips” line. Salma Hayek, Liv Tyler, Emily Ratajkowski and Cindy Crawford will also get their own shades.

Tilbury’s “Hot Lips” collection will be available on June 27 at Charlotte Tilbury’s flagship store and online in the UK. Check out snaps of Kardashian’s upcoming lip shade below.

Meanwhile, Kim’s sister is doing well with her own business ventures. Her latest release of Lip Kits was a sold out. Kylie is also selling 75 of her closet must-haves on eBay. Jenner is selling pre-loved clothes and shoes on the online auction site to help an LA children’s hospital. Items on sale go from $9 (US$7) to around $345 (US$256).