WAIKIKI (KHNL) -- They were first known as the Fabulous Echoes.
But in 1969, they changed their name when they arrived in Hawaii.
Now the Society of Seven is a household name in the islands and this classic group is back home for some special performances.
From familiar songs to familiar faces, the SOS Classic has entertained audiences for 40 years. That's amazing to Bert Sagum, who's one of two original members.
"Because time goes by, just like that, when you're having fun, time goes so fast," said Sagum.
Although the music has changed, the level of talent, hasn't.
"Everytime we change a member of the group, we always get somebody who's just like the one that left, or better," said Sagum.
In recent years, the SOS Classic has been wowing audiences in Sin City. But this week, they return to the Outrigger.
"It just feels like we never left. The last time we were here, we had just a great time, that's why we said, let's do it again. We just wanna be back in Hawaii, Hawaii is just the greatest place to be," said Sagum.
Also this week, they're performing with the SOS Las Vegas, who despite their name, entertains fans in Honolulu.
The groups are different and perform in different cities, but fans, still confuse the two.
"It's so funny because I'll be in the autograph line after and people will come up and I've learned already, and they'll say 'Bert how you doing? And I just go along with it, said 'yah, thanks for coming,' and they say, 'we saw you so many times,' thanks for coming," said Richard Natto, member of SOS-LV.
The two bands actually performed alongside each other for the first time in May. They were such a hit, the Outrigger decided to reunite them again and everyone is grateful.
"And whenever I walk through those doors at night, I remind myself to keep the standards high of the SOS and to do the show the best we can do, every night," said Natto.
Four decades later, there are now two, SOS groups and a huge following. It's something the bandmembers never take for granted.
"This is the gig of gigs right here.I'm telling you. Everybody in town wants this gig and then some. We get calls, 'hi, anyone leaving the band yet, because we want to join, man!" said Natto.
"Let me tell you it's just great to be in a group like this for 40 years. I can't ask for a better life," said Sagum.