Britney Spears allegedly caused a scene while dining at a Los Angeles restaurant with two friends on Wednesday. Sources told TMZ that the pop star “was raising her voice, screaming, and even barking at times” during the incident at Blue Dog Tavern in Sherman Oaks, which witnesses described as “chaotic” and “kind of sad.” A restaurant patron claimed Spears, 44, walked by their table holding a knife and sparked fear that she might accidentally stab someone. Spears (seen above in Westlake Village, Calif. in November 2025) allegedly caused a scene at Blue Dog Tavern in Sherman Oaks on Wednesday night while dining with two friends. Clint Brewer Photography / BACKGRID Spears (seen above holding a knife in an old video on her Instagram) barked, yelled and wielded a knife during the incident, according to TMZ. britneyspears/Instagram The “Toxic” singer, who was with a man and a woman, reportedly lit a cigarette near the door, which forced staff to ask her male friend to have her put it out.…