The Grammy Award winner – real name Stefani Germanotta – is suing Excite Worldwide, LLC in New York, after the company allegedly tried to profit from her brand.
According to the lawsuit, the company applied without her permission to trademark the names Lady Gaga and Lady Gaga LG for a make-up and jewelry range.
Lady Gaga – who burst onto the scene in 2008 has released two hit albums – is said to be in the process of developing her own range of products.
The singer has already registered her name for clothes, ringtones, her website and chat rooms.
In addition, a trademark is pending for hair, body and nail products.
Lady Gaga is said to be seeking unspecified damages from Excite Worldwide, LLC following the attempt to trademark her name.