<p>The US Super Bowl halftime show, one of pop music's most visible gigs, this year went from highly coveted to largely unwanted, leaving the NFL scrambling for takers as a cultural firestorm over social justice rages.</p>
<p>Prominent artists including Rihanna, P!nk and Cardi B reportedly turned down the offer to headline Sunday's championship game between the New England Patriots and Los Angeles Rams, amid the controversy over racially charged police brutality protests spearheaded by former San Francisco 49ers quarterback Colin Kaepernick.</p>