The 'Rolling in the Deep' singer showed off the inking behind her right ear on the red carpet outside the Los Angles Staples Center last night (February 10).
The 21 songstress went on to win the Grammy for 'Best Pop Solo Performance', and was seen apparently shouting at Chris Brown later in the ceremony.
Angelo was first speculated as the name of Adele and partner Simon Konecki's baby last month when the 'Someone Like You' star was spotted wearing a necklace with it on.
Alleged insiders have since claimed that the baby's full name is Angelo James Konecki.
Adele was photographed with her son for the first time on January 10 when she flew into Los Angeles for the Golden Globe awards, where she won 'Best Original Song' for James Bond theme 'Skyfall'.
She is believed to have given birth to Angelo back in October.
4Music will air a 90-minute Grammys show in the UK tonight (Monday, February 11) at 10pm, repeated on Saturday, February 16.
Photo gallery - Grammy Awards higlights:
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