Millions of fans on both sides of the U.S.-Mexico border are mourning the death of Jenni Rivera, whose performances of soulful ballads sold out concert halls and made the singer a household name for many.

Crews searched for the remains of Rivera and six others Monday amid the wreckage of a plane that crashed in a remote, mountainous area in northern Mexico on Sunday.

“The plane was totally destroyed. … It is a great tragedy,” her brother, Gustavo Rivera said

There were no survivors,and the singer’s publicist, lawyer and makeup artists were among those killed, he said. Family members were planning to travel to Mexico on Monday as investigators work to determine what caused the crash.