✅ Yes, the content about Justin Timberlake's festival performance sparking outrage for singing only briefly appears to be true and is reported by multiple major news outlets.

These include:

1. https://consequence.net/2025/07/justin-timberlake-electric-castle-performance/ - (Trust Score 8/10)

- Reports that Justin Timberlake was criticized for a lackluster performance at Electric Castle festival in Romania, where he sang briefly, relying heavily on backing tracks, and often encouraged the crowd to sing instead.

2. https://www.cosmopolitan.com/entertainment/music/a65499962/justin-timberlake-not-singing-during-own-concerts/ - (Trust Score 7.5/10)

- Details backlash from fans across festival appearances including Romania and Paris, noting Timberlake's habit of not singing many parts and using the crowd to sing along, resulting in disappointment expressed online.

3. https://www.foxnews.com/entertainment/justin-timberlake-leaves-fans-fuming-after-barely-singing-during-festival-concert - (Trust Score 8/10)

- Covers fan frustration after Timberlake's minimal singing at Electric Castle, highlighting social media ridicule and describing the performance as disappointing, with Fox News reaching out for comment.

These consistent reports across credible entertainment news outlets confirm the authenticity of the claims that Justin Timberlake's recent festival performance led to significant fan outrage due to brief singing and heavy reliance on backing tracks.