Kingston Rossdale, Gwen Stefani, Apollo Rossdale and Zuma Rossdale in October 2023. Emma McIntyre/Getty Images Gwen Stefani gave her 10-year-old son Apollo a history lesson when he asked about her upcoming music gig at Coachella. “I had to literally lay in bed with Apollo and he’s like, ‘But mom, what is Coachella? Everyone’s saying it. What is this? It sounds like it’s a big deal,’” Gwen, 54, recalled to People on Friday, January 26. (The “Hollaback Girl” singer shares sons Kingston, 17, Zuma,