Offering three days of non-stop music by acts like Maroon 5, Tom Petty and the Heartbreakers and Foo Fighters, alongside a bounty of regional food, wine and beer offerings, promoters expect more than 120,000 people to attend the three-day concert at the Napa Valley Expo over Memorial Day weekend. Ayesha Curry, who is set to open a barbecue restaurant, International Smoke, with chef Michael Mina in San Francisco this summer, surprised fans with a star-studded set at the festival’s Williams-Sonoma Culinary Stage. Along with Vallejo-bred rapper E-40, who sparked a “Choices (Yup)” sing-along during the cooking demo, actress Tamera Mowry made a quick guest appearance. To top things off, Ayesha Curry fused food and music, dropping bars a la Drake’s “Energy,” substituting culinary-themed lyrics in a freestyle riff that began: “Got a recipe, got a lot of recipes.” Four years after the Seattle rapper and his musical partner Ryan Lewis broke through with novelty hit singles like “Thrift Shop” and “Can’t Hold Us,” the duo was still able to draw a sizable crowd to the main stage at BottleRock on Friday afternoon. “I feel like we’re at the Kentucky Derby or some s—,” the award-winning rapper observed, surveying the vast green lawn and double tiered VIP section. The band’s exhaustive set, which had fans singing and bouncing along, was punctuated by the frontman’s lengthy monologues and the new track, “F— Trump.” on the culinary stage to prepare a chicken dish that didn’t quite turn out right. Playing on the second stage, the Portland indie rock band tore through songs like “Dashboard,” “The World at Large” and “Lampshades on Fire,” blasting feedback and bark. [...] even with a slew of crowd pleasers like “Moves Like Jagger,” “This Love” and “She Will Be Loved,” the Maroon 5’s headlining set on the main stage Friday felt a little off. Frontman Adam Levine (sporting a haircut on loan from Justin Bieber) did his best to rile up the crowd, at one point anncouncing, “This is my new favorite festival!” But the band’s lite soul music didn’t seem to demand much from the audience — or maybe all that day drinking finally caught up with everyone. Recent singles like “Sugar” and “Don’t Want to Know” offered a late-set boost, but by the time the group summoned its karaoke style cover of Prince’s “Let’s Go Crazy” fans were already flocking for the exits. Warren G, finishing out the night for the Lagunitas Stage, started 25 minutes later than scheduled but opened strong with “This DJ.” Before his festival-closing set, the “Regulators” rapper appeared on the culinary stage opposite celebrity food host Adam Richman (“Man v.