Luke Bryan has joked that Carrie Underwood will need to “up her therapist” after joining ‘American Idol’. The 41-year-old singer has replaced Katy Perry on the show’s judging panel, but Luke – her new co-star – has warned Carrie that she’ll face some fierce competition from himself and Lionel Richie. Asked what advice he has for Carrie, the 48-year-old star said in a TikTok video: “Up her therapist. If she has a therapist, she’s probably going to have to double to deal with me and Lionel.” Luke subsequently joked that he was happy to assist his new co-star. Luke quipped: “Do therapists do gift…