The provided article text could not be retrieved: instead of the intended content about NOS Alive Festival 2026, only a bot-protection holding page was returned, reading "Just a moment… Enable JavaScript and cookies to continue." As a result, there is no substantive reporting to summarise regarding which six acts were highlighted or any related festival details.

Based on the title alone, the piece appears to be a Clash Music preview recommending six must-see performers at Portugal's NOS Alive Festival in 2026, but no line-up names, dates, ticketing information or venue details are available in the supplied text. To produce an accurate summary, the full article would need to be accessed directly, as the page's content was blocked behind a JavaScript and cookie verification screen.