Oprah Winfrey was spotted in CVS on Boylston Street on Thursday morning. She was there just buying stuff, according to spectators who tweeted photos of her in line. This is like that time in August when Winfrey shopped at Bed Bath & Beyond in Framingham. Apparently, she likes to do her errands here. Winfrey was just in New York for a screening of her pal Beyoncé’s HBO special, “Beyoncé: Life Is but a Dream.” She also filmed a segment with Beyoncé for her “Oprah’s Next Chapter” series, which airs Saturday.