Xavi is back on top…

The 19-year-old Mexican American singer has earned his second No. 1 on Billboard’s Regional Mexican Airplay chart as “Corazón de Piedra” advances from No. 3 to lead the May 25-dated ranking.

“Corazón de Piedra” takes the top spot as the Greatest Gainer of the week, with 7.8 million audience impressions on U.S. reporting radio stations during the May 10-16 tracking week, according to Luminate.

That’s a 27% gain from the week prior. Last week’s leader, Shakira and Grupo Frontera’s “(Entre Paréntesis),” slips to No. 2 after falling 15% in audience, to 6.3 million.

To date, the biggest supporters for “Corazón de Piedra” among reporters to the Regional Mexican Airplay chart reporting panel are KOND Fresno, Calif., KISF Las Vegas and KLNO Dallas, all with over 400 plays for it since its release, followed closely by WOJO Chicago and KHOT Phoenix (with all five stations owned by Univision).

Thanks to “Corazón de Piedra,” Xavi nabs his second No. 1 on Regional Mexican Airplay, just three months after “La Diabla” earned him his maiden champ on the Feb. 10-dated list (the latter dips 24-38 on the latest chart, with a 31% drop in audience, to 2 million).

In between his two chart-toppers, the Phoenix-based artist reached No. 20 with “La Víctima” (chart dated March 2).

Beyond its Regional Mexican Airplay coronation, “Corazón de Piedra,” released March 23 through Interscope/ICLG, reaches a new peak on the overall Latin Airplay tally, jumping 9-5 in its seventh week.