Under Armour has named Argentine pop star Tini Stoessel as its newest global brand ambassador, a move that kicks off with her debut in the UA Halo Racer. The partnership, announced on Thursday, unites the brand’s performance ethos with Stoessel’s cross-genre influence and a following that spans more than 35 million fans worldwide.

Stoessel’s debut campaign spotlights the UA Halo Racer, Under Armour’s speed-driven silhouette engineered with the brand’s Hovr+ cushioning platform. Designed for propulsion with a TPU plate and layered in black, red and silver mesh and synthetics, the Halo Racer bridges the performance-lifestyle gap that the brand has been leaning into since unveiling the Halo franchise earlier this month.

“Joining Under Armour feels like a natural step for me. I deeply believe in betting on yourself, pushing your own limits, and being authentic — whether I’m on stage, training or just living life,” Stoessel said in a statement. “This partnership is about movement, mindset and inspiring young people — especially women — to feel powerful in their own skin.”

The Halo line is a key part of Under Armour’s footwear reset, following the debut of the Halo Runner and Halo Trainer. Each incorporates the reengineered “Heartbeat” logo into the midsole as a stabilizing element, underscoring chief product officer Yassine Saidi’s goal of merging brand identity with functional design. “Halo is the start of a new era and a statement of intent,” Saidi told FN earlier this month.

Melissa de León, marketing director for Under Armour Latin America, called Stoessel “a force in everything she does,” adding, “She’s a partner who embodies determination, self-confidence and the courage to break boundaries.”

Beyond product, the collaboration will play out across co-created digital storytelling, global and regional campaigns, and live activations. Stoessel will headline Under Armour’s presence at Futttura, a seven-date festival running from October to November, where the brand will connect sports style and performance messaging directly to a Gen Z audience.

The move also reflects a broader industry shift toward musician-athlete partnerships, with artists increasingly defining sportstyle aesthetics and bridging performance and entertainment. For Under Armour — still navigating revenue pressures and a footwear rebuild — the alignment with Stoessel reinforces its push for cultural relevance and market reach.

All UA Halo models, including the Halo Racer, are available now at underarmour.com and select retailers worldwide.