'Focus' beauty Ariana Grande has told her fans to treat themselves to items from her MAC VIVA Glam campaign because from each purchase made, "every penny" will be donated to MAC's AIDS Fund. 

The collection, which features a stunning deep berry lipstick and a shimmering pink lipglass, is on sale now and she took to her official Twitter page late last night to promote it further: "My @maccosmetics #vivaglam lipstick & gloss are out every penny goes to the MAC Aids Fund. did I mention every single penny goes toward the MAC Aids Fund? Please order yours today!"

Grande, meanwhile, has recorded a duet with ex-boyfriend Nathan Sykes on his single 'Over and Over Again' and this new version of the song is due to be released on January 15. On January 10, she tweeted: "From the heat of night to the break of day I'll keep you safe & hold you forever..." #OverAndOverAgain."

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