Final answer:
Selena Gomez found that her addiction to social media was threatening to ruin the alterna-fiesta.
Step-by-step explanation:
Selena Gomez found that her addiction to social media was threatening to ruin the alterna-fiesta. In an interview, she revealed that being the most followed person on social media became consuming for her, affecting her mental well-being. It put things in her head that she didn't want to care about and took away her joy.
Given that the references include a discussion on Selena Gomez's relationship with social media, historical accounts of festivities, and visual arts related to cultural identity and struggles, it is possible that the 'alterna-fiesta' is a metaphor for Gomez's online presence or her attempt at curating her own narrative and celebrations free from the pressures and threats of social media consumption and the impact it had on her mental health and privacy.