1970s Mandrell; all scored hits throughout the 70s which reached both country and pop charts. The genre also saw its golden age of vocal duos and groups in this decade; with Conway Twitty and Loretta Lynn, George Jones and Tammy Wynette, Jim Ed Brown and Helen Cornelius, the Bellamy Brothers, the Oak Ridge Boys, the Statler Brothers, Dave & Sugar, and The Kendalls. A major event in music in the early 1970s was the deaths of popular rock stars Jimi Hendrix, Janis Joplin, and Jim Morrison, all at the age of 27. Two of popular music's most successful artists from other
Janis Joplin time in 2002 when The Criterion Collection released the box set. For the remainder of 1967, even after Big Brother signed with Albert Grossman, they performed mainly in California. On February 16, 1968, the group began its first East Coast tour in Philadelphia, and the following day gave their first performance in New York City at the Anderson Theater. On April 7, 1968, the last day of their East Coast tour, Joplin and Big Brother performed with Jimi Hendrix, Buddy Guy, Joni Mitchell, Richie Havens, Paul Butterfield, and Elvin Bishop at the "Wake for Martin Luther King, Jr." concert in