Hosted by Maya Jama, Glow Up returns for its fourth series as ten aspiring make-up artists are tested in varied professional assignments, from TV to theatre, fashion to front covers and on-line beauty campaigns.The make-up artists (MUAs) travel to Birmingham for their first professional assignment, a social media campaign for a sport and fitness brand. Guest judge Ivy Weir-Ikpeme, the company's styling manager, challenges the MUAs to produce a gym-friendly, natural make-up look for their diverse customer base.In the creative brief, the MUAs are challenged to produce a look on themselves based on their hidden strength. Encouraged to be bold and push their creativity to the limits, the MUAs produce some jaw-dropping creations, ranging from a prosthetics-based chameleon to an intergalactic atomic explosion. And a survivor of the Manchester terrorist attacks uses volcanic fire to display their hidden strength over adversity.Finally, in the first face-off elimination, the bottom two MUAs are challenged to produce an on-trend look, the reverse cat eye. After this, the judges decide who is the first to leave the competition.