The first partnership for Christian Nodal and Banda MS pays dividends as “La Sinvergüenza” reaches No. 1 on Billboard’s Regional Mexican Airplay chart dated Nov. 27. The song ascends from No. 3 in its eighth week thanks to a 21% boost in audience impressions, to 8 million, earned in the week ending Nov. 21, according to MRC Data. The new No. 1 grants Nodal his 13th leader. Plus, he extends his No. 1 career record among regional Mexican soloists, steadily scoring chart champs every year since his first win in 2017 (“Adios Amor,” seven-week reign). With 16 leaders, meanwhile, Banda MS ties with Conjunto Primavera and Intocable for the second-most No. 1s among all acts, just behind Calibre 50’s 20 wins. The Sinaloans, who earned its first Regional Mexican Airplay entry in 2001, took over atop...