James turned 48 years old on Saturday (26Mar16) and celebrated by joining his old bandmates Billy Corgan and drummer Jimmy Chamberlin at their concert at the Ace Hotel.
"Yes, it's James Iha," Corgan told the audience.
James performed songs from the group's 1993 LP Siamese Dream including Mayonaise, Soma, Rocket, Today, Disarm, Spaceboy and Pisces Iscariot's Whir.
The guitarist left the band in 2000 after their first break-up. However, he reunited with the group earlier this month (Mar16), when they threatened to sue an anonymous source over leaks of their old demos.