Boy bands have been a pop culture phenomenon for decades, and Ranker.com users are casting their votes for the greatest boy bands of all time. The results? Nostalgia reigns supreme! Here are the Top 20 boy bands as ranked so far: 1️⃣ Backstreet Boys 2️⃣ ‘N Sync 3️⃣ New Kids on the Block 4️⃣ One…