[Answer] 5. A duo had a huge smash the week of February 6, 1965, with "You've Lost That Lovin' Feelin'" Who was this talented twosome?

Step 1 : Introduction to the question "5. A duo had a huge smash the week of February 6, 1965, with "You've Lost That Lovin' Feelin'" Who was this talented twosome?"

...1. Jan and Dean 2. The McCoys 3. Sonny and Cher 4. The Righteous Brothers The Righteous Brothers adopted their name when they were performing for black Marines at the Black Derby in Santa Ana, California, who claimed the boys were "righteous". Bill Medley was formerly in a group called The Paramours and Bobby Hatfield was a member of the Variations. They teamed up and after hearing them at the Rendezvous Ballroom a producer decided to record them. Their original song, "Little Latin Lupe Lu," had hot local sales. They started appearing with major acts including the Ronettes and eventually came to the attention of Phil Spector, who recorded them singing the Spector/Mann/Weil song. Jan and Dean sang "Surf City." Sonny and Cher had a hit with "I've Got You, Babe." Sonny also worked for Spector at one time. The McCoys charted with "Hang On Sloopy."

[Answer] who was the first rock musician to famously smash their instrument on stage?

Step 1 : Introduction to the question "who was the first rock musician to famously smash their instrument on stage?"

...In the mid 1960s, guitarist Pete Townshend of The Who was the first guitar-smashing rock artist. Rolling Stone Magazine included his smashing of a Rickenbacker guitar at the Railway Tavern in Harrow and Wealdstone in September 1964 in their list of "50 Moments That Changed Rock & Roll".