An Alexa Chung shout out lends such massive credibility to a brand that it should come in the form of a really heavy trophy. It's the type of information that should be in the first paragraph of the brand's Wikipedia page; they should make those little seal-of-approval stickers, "Alexa's Pick!"
Topshop's Rio Rio lipstick experienced a double whammy: an Alexa Chung endorsement, seconded by Liv Tyler. Since that rather large blip in the ITG Neat Product radar, they've been quietly building their own street cred. A great felt-tipped liner here, a soft smudgy formula there, and a Freckle Pencil (probably just the standard liner formula, only done in a frecklish taupe—but the sentiment is cool!).
But the real star of their beauty collection, at least currently, is the Chameleon Glow Eyeshadow, specifically in Shuffle The Cards—a yellow metallic that flashes warm baby pink depending on the angle. Wet it with eyedrops and load a short, fluffy but stiff shadow brush with the flakey metallic pigment and press onto the lid for full impact (Nars Wet/Dry brush was made for this exact purpose). Blend and shape with a clean, fluffier brush to diffuse the shadow nicely over the entire lid and soften any edges.
Not sure if she'd tried this one yet, but it's worth Alexa-level hype.
Dorothea Barth-Jorgensen (The Lions) photographed by Tom Newton. Makeup by Annie Kreighbaum.