No brothers but friends from Orange County, CA: Bill Medley and Bobby Hatfield. Earl Palmer on drums.
Cilla Black [n°2 UK]
Eddy Mitchell [as J'ai perdu mon amour]
Trea Dobbs [hit NL]
Blossoms [produced by Bill Medley]
Bill Medley [Righteous Brother solo]
Barry Mann [coauthor on rare solo album Lay It All Out]
Telly Savalas [follow-up of If]
You've Lost That Lovin Feeling by The Righteous Brothers is by far the song with the most spins on American radio. BMI registrated over 7 million. That's almost 50 years in a row. To prove it: 7.000.000 x 3'38" = 25.433.333 minutes, divided by 60 = 423.889 hours, divided by 24 = 17.662 days, divided by 365 = 48 years and 3 months.